HP / Compaq 1900

8/7/2019 HP / Compaq 1900

1/94

Maintenance & Service GuidePresario 1900 Series

Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930

Before You Begin Specifications Parts Catalog

Removal Sequence Troubleshooting Battery OperationsProduct Description Pin Assignments Index

Presario 1900 Series

Welcome to the Maintenance & Service Guide(MSG). This online guide is designed to serve theneeds of technicians whose job it is to repairCompaq products. The Notice contains thecopyright and trademark information. The Prefaceshows symbol conventions, Technician Notes andSerial Number locations on the unit.

This MSG periodically will be maintained andupdated online as needed.

Tech Support..

To report a technical problem, contact yourRegional Support Center or IM Help Center.

For the best results when printing this MSG, setprinter properties to landscape.
http://h18000.www1.hp.com/copyright.html

8/7/2019 HP / Compaq 1900

2/94

8/7/2019 HP / Compaq 1900

3/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930


Removal Sequence Troubleshooting Battery Operations

Product Description Pin Assignments Index

Notice

The information in this guide is subject to change without notice.

COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OREDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTALOR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING,PERFORMANCE, OR USE OF THIS MATERIAL.

This guide contains information protected by copyright. No part of this guide may bephotocopied or reproduced in any form without prior written consent from CompaqComputer Corporation.

2000 Compaq Computer Corporation.All rights reserved. Printed in the U.S.A.

Compaq, Presario Registered U. S. Patent and Trademark Office.

Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation.Windows 98 is a trademark of Microsoft Corporation.

The software described in this guide is furnished under a license agreement ornondisclosure agreement. The software may be used or copied only in accordance withthe terms of the agreement.

Product names mentioned herein may be trademarks and/or registered trademarks oftheir respective companies.

Maintenance and Service Guide

Compaq Presario 1900 Series Portable Computers

First Edition (Oct. 1998)Compaq Computer Corporation
http://h18000.www1.hp.com/legal.htmlhttp://h18000.www1.hp.com/privacy.html

8/7/2019 HP / Compaq 1900

4/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Specifications

This chapter covers the following specifications of Compaq Presario 1900Series Portable Computers:

q Physical and Environmental

q System Interrupts

q System DMA

q System I/O Addresses

q System Memory Catalog

q Display Information

q Diskette Drive

q Hard Drive

q CD ROM or DVD Drive
http://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.htmlhttp://-/?-http://h18000.www1.hp.com/legal.htmlhttp://h18000.www1.hp.com/privacy.htmlhttp://-/?-http://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.html

8/7/2019 HP / Compaq 1900

5/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Specifications

P h y s ic a l a n d En v ir o n m e n t a l

Computer Specifications

U.S. Metric

12.1 in TFT Dimensions

HeightDepthWidth

13.3 in TFT Dimensions

HeightDepth

Width

1.1 in11.6 in9.2 in

1.2 in11.6 in

9.2 in

234mm294.7mm29mm

234mm294.7mm

30.5mm

Weight

12.1 in TFT13.3 in TFTWedge

4.5 lbs5.0 lbs1.8 lbs

Stand-Alone (Battery Pack) Pow er Requirements

Nominal Operating

Maximum AveragePeak Operating

Li-ion

W @ 14.4 VW @ 14.4 VW @ 14.4 V

AC Power Requirements

Operating VoltageOperating CurrentOperating Frequency

Maximum Transient

100-240 V0.8/0.4 A RMS47-63 HzMeets IEC 801-4 and IEC801-51kV for 50 ns

Temperature

Operating 50 to 95 F 10 to 35 C

Nonoperating -4 to 140 F -20 to 60 C

Relative Humidity (noncondensing)

Operating 10 to 90% 35C to 90%

Nonoperating (tw = 38.7C max) 5 to 95% 60C to 95%

Altitude

Operating 0 to 10,000 ft 0 to 3.15 km

Nonoperating 0 to 30,000 ft 0 to 9.14 km

Shock

Operating 10 G, 11 ms, half sine

Non operating 240 G, 2 ms, half sine

Vibration

Operating 0.5 G

Nonoperating 1.5 G

NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. CompaqPresario 1900 Series Portable Computers operate well within this range of temperatures.

Next Page

8/7/2019 HP / Compaq 1900

6/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Specifications

S y s t e m I n t e r ru p t s

IRQ Device(s)

0 System Timer

1 Standard 101/102-Key or MicrosoftNatural Keyboard

2 Programmable Interrupt Controller

3 Ambit Modem

4 Communications Port (COM1)

5 NMA2 Audio Controller

6 Standard Floppy Disk Controller

7 Printer Port (LPT1)

8 System CMOS/Real Time Clock

9 Intel 82371AB/EB PCI to USB UniversalHost Controller

10 PCI Fast Ethernet DEC 21143 BasedAdapter

11 Texas Instruments PCI-1225 CardBusController

NeoMagic NMG5 Graphics Controller

12 PS/2 Compatible Mouse Port

13 Numeric Data Processor

14 Intel 82371AB/EB PCI Bus Master IDEController

15 Intel 82371AB/EB PCI Bus Master IDEController

Next Page
http://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.htmlhttp://h18000.www1.hp.com/legal.htmlhttp://h18000.www1.hp.com/privacy.htmlhttp://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.html

8/7/2019 HP / Compaq 1900

7/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930




Specifications

S y s t e m DMA

DMA Device(s)



2 Floppy Disk Controller

3 Parallel Port (ECP Mode)

5 Free

6 Free

7 Free
http://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.htmlhttp://h18000.www1.hp.com/legal.htmlhttp://h18000.www1.hp.com/privacy.htmlhttp://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.html

8/7/2019 HP / Compaq 1900

8/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Specifications

S y s t e m I / O A d d re s s

I/O Address System Function (Shipping Configuration)

0000 - 000F Direct Memory Access Controller

0020 - 0021 Programmable Interrupt Controller

0040 - 0043 System Timer

0060 - 0060 Standard 101/102-Key or Microsoft Natural Keyboard

0061 - 0061 System Speaker


0070 - 0071 System CMOS/Real Time Clock0081 - 008F Direct Memory Access Controller

00A0 - 00A1 Programmable Interrupt Controller

00C0 - 00DF Direct Memory Access Controller

00E0 - 00E1 Motherboard Resources

00F0 - 00FF Numeric Data Processor

0170 - 0177 Intel 82371AB/EB PCI Bus Master IDE Controller

01F0 - 01F7 Intel 82371AB/EB PCI Bus Master IDE Controller

0201 - 0201 Gameport Joystick

0274 - 0277 IO read data port for ISA Plug and Play Enumerator


0378 - 037F Printer Port (LPT1)

03B0 - 03BB NeoMagic NMG5 Graphics Controller

03C0 - 03DF NeoMagic NMG5 Graphics Controller

03F0 - 03F5 Standard Floppy Disk Controller



03F8 - 03FF Communications Port (COM1)

03D0 - 04D1 Motherboard Resources

0CF8 - 0CFF PCI Bus

1000 - 103F Motherboard Resources


1050 - 105F Intel 82371AB/EB PCI Bus Master IDE Controller

1060 - 107F Intel 82371AB/EB PCI to USB Universal Host Controller

1080 - 10FF PCI Fast Ethernet DEC 21143 Based Adapter

1400 - 14FF PCI Communication Device

1800 - 1807 PCI Communication Device

S y s t e m Me m o ry Ca t a lo g

MemoryAddress

Device

00000000 -0009FFFF

System Board Extension for PnP BIOS

000A0000 -000AFFFF


000B0000 -000BFFFF


000C0000 -000CBFFF


000E4000 -000FFFFF


00100000 -

03FFFFFF


04000000 -04000FFF

Texas Instruments PCI-1225 CardBus Controller

04001000 -04001FFF

Texas Instruments PCI-1225 CardBus Controller

F4000000 -F40000FF

PCI Communication Device

F4000400 -F40007FF

PCI Fast Ethernet DEC 21143 Based Adapter

F4100000 -F41FFFFF


F4100000 -F47FFFFF

Intel 82443BX Pentium(r) II Processor to AGPController

F4200000 -F42FFFFF

PCI Multimedia Audio Device

F4400000 -F47FFFFF


F4C00000 -F4FFFFFF

PCI Multimedia Audio Device

F4C00000 -F5FFFFFF

Intel 82443BX Pentium(r) II Processor to AGPController

F5000000 -F5FFFFFF NeoMagic NMG5 Graphics Controller

F8000000 -FBFFFFFF

Intel 82443BX Pentium(r) II Processor to PCIBridge (with GART support)

FFF80000 -FFFFFFFF

Motherboard Resources

D is p la y I n f o r m a t io n

12.1 in TFT Display

U.S. Metric

12.1 in TFTDimensions

HeightDepthWidth

1.1 in11.6 in9.2"

234mm294.7mm29mm


HeightDepthWidth

1.2 in11.6 in9.2 in

234mm294.7mm30.5mm

M e m o r y Ex p a n s io n ( N o t A p p l ic a b le in t h is Fo r m Fa c t o r)

D is k e t t e D riv e

Storage Drives

3.5 in Drive LS-120 Drive

Capacity per Diskette (High/Low)Low 720KBHigh 1.44MB

InformationNot Applicable

Diskette Size 3.5 in

Number of LED Indicators(Read/Write)

1

Number of Drives Supported 1

Drive Rotation (rpm) 360

Low 31

8/7/2019 HP / Compaq 1900

9/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930




Specifications

S y s t e m I / O Ad d re s s

I/O Address System Function (Shipping Configuration)


0020 - 0021 Programmable Interrupt Controller

0040 - 0043 System Timer


0061 - 0061 System Speaker


0070 - 0071 System CMOS/Real Time Clock


00A0 - 00A1 Programmable Interrupt Controller

00C0 - 00DF Direct Memory Access Controller

00E0 - 00E1 Motherboard Resources

00F0 - 00FF Numeric Data Processor



0201 - 0201 Gameport Joystick

0274 - 0277 IO Read Data Port for ISA Plug and Play Enumerator


0378 - 037F Printer Port (LPT1)

03B0 - 03BB NeoMagic NMG5 Graphics Controller

03C0 - 03DF NeoMagic NMG5 Graphics Controller




03F8 - 03FF Communications Port (COM1)

03D0 - 04D1 Motherboard Resources

0CF8 - 0CFF PCI Bus



1050 - 105F Intel 82371AB/EB PCI Bus Master IDE Controller

1060 - 107F Intel 82371AB/EB PCI to USB Universal Host Controller

1080 - 10FF PCI Fast Ethernet DEC 21143 Based Adapter

1400 - 14FF PCI Communication Device

1800 - 1807 PCI Communication Device

S y s t e m Me m o ry Ca t a lo g

Memory Address Device

00000000 - 0009FFFF System board extension for PnP BIOS

000A0000 - 000AFFFF NeoMagic NMG5 Graphics Controller

000B0000 - 000BFFFF NeoMagic NMG5 Graphics Controller

000C0000 - 000CBFFF NeoMagic NMG5 Graphics Controller

000E4000 - 000FFFFF System Board Extension for PnP BIOS

00100000 - 03FFFFFF System Board Extension for PnP BIOS

04000000 - 04000FFF Texas Instruments PCI-1225 CardBus Controller

04001000 - 04001FFF Texas Instruments PCI-1225 CardBus Controller

F4000000 - F40000FF PCI Communication Device

F4000400 - F40007FF PCI Fast Ethernet DEC 21143 Based Adapter

F4100000 - F41FFFFF NeoMagic NMG5 Graphics Controller

F4100000 - F47FFFFF Intel 82443BX Pentium(r) II Processor to AGPController

F4200000 - F42FFFFF PCI Multimedia Audio Device

F4400000 - F47FFFFF NeoMagic NMG5 Graphics Controller

F4C00000 - F4FFFFFF PCI Multimedia Audio Device

F4C00000 - F5FFFFFF Intel 82443BX Pentium(r) II Processor to AGPController

F5000000 - F5FFFFFF NeoMagic NMG5 Graphics Controller

F8000000 - FBFFFFFF Intel 82443BX Pentium(r) II Processor to PCIBridge (with GART Support)

FFF80000 - FFFFFFFF Motherboard Resources

D is p la y I n f o r m a t i o n

12.1 in TFT Display

U.S. Metric


HeightDepthWidth

1.1 in11.6 in9.2 in

234mm294.7mm29mm


Height

DepthWidth

1.2 in11.6 in

9.2 in

234mm294.7mm

30.5mm

D is k e t t e D r iv e

Storage Drives

3.5 in Dr ive LS-120 Drive

Capacity per Diskette(High/Low)

Low 720KBHigh 1.44MB

InformationNot Applicable

Diskette Size 3.5 in

Number of LED Indicators(Read/Write)

1

Number of Drives Supported 1

Drive Rotation (rpm) 360

Transfer Rate (Kbps/Sec) Low 31High 62

Bytes per Sector 512

Sectors per Track (High/Low)Low 9High 18

Access Times

Track-to-Track (ms)Head Setting (ms) 3ms

15ms

Cylinders (High/Low) Not Available

8/7/2019 HP / Compaq 1900

10/94

8/7/2019 HP / Compaq 1900

11/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




I llustrated Parts Catalog

System Unit

Boards

Display Assembly

Mass StorageDevices

MiscellaneousHardware andPlastics Kit

MiscellaneousHardware andPlastics Wedge Kit

MiscellaneousParts

Documentation

and Software

Configure toOrder

S y s t e m Un it

Description

1. Keyboards

U.S.

331419-001(or)140676-001(or)159404-001

International

331419-002(or)

140676-002(or)159404-002

UnitedKingdom

331419-031(or)159404-031

Asia Pacific

331419-

AA1People'sRepublic ofChina

331419-371

France

331419-051(or)140676-051(or)159404-

051

Latin America331419-161

Japan

331419-291(or)159404-291

Italy

140676-061(or)159404-061

2. Upper CPU Coverw/Palmrest andTouchPad SparePart No: 331423-001 or 140678-001or 159400-001

3. Speaker Assemblyw/Cable Spare PartNo: 331420-001

4. Battery Pack - Liion Spare Part No:386500-001 or140664-001

5.CPU Base AssemblyEnclosure with SystemBoard and SpeakerAssembly, (BottomPlastics)Spare Part No: 331414-001 or 140671-001 or159398-001 (model1930)

6. CPU Base AssemblyEnclosure with Shield,(Bottom Plastics -Not Shown)Spare Part No: 331421-001 or 140679-001

8/7/2019 HP / Compaq 1900

12/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





System Unit

Boards

Display Assembly

Mass Storage

Devices

Miscellaneous

Hardware and

Plastics Kit

Miscellaneous

Hardware and

Plastics Wedge Kit

Miscellaneous

Parts

Documentation

and Software

Configure to Order

B o a r d s

Description SparePartNumber

1. Processors

PentiumII/266-MHzw/512 Cache

400779-001


400780-001

Celeron/266-MHz w/128KCache

102422-001

Celeron/300-MHz w/128KCache

102268-001

PentiumII/333-MHzw/256K Cache

107999-001 or159864-001

Celeron II/333-MHz w/128Cache

140670-001

Celeron II/400-MHz w/128KCache

159865-001

PentiumII/300-MHz

w/512 Cache

140667-001

Celeron II/300-MHz w/128Cache

140668-001

Pentium 333MKz w/256cCache

107999-001 or159864-001

Celeron II/333MHz w/128Cache

14670-001

Celeron II/400MHz w/128

Cache

159865-001


159866-001


159445-001

2. HardDrive/Battery

Charger Boardw/RTC Battery

331412-001

3. Modemw/Shield, 56.0Kbps Data/Fax

331429-001

4. Low VoltageDifferentialSignal Board

(For 13.3'Display Panel)

331411-001or

159396-001

5. VoltageConverter Board

331413-001

6. PC CardAssembly

102123-001

7. Fan Assembly

(Not Shown)

331410-

001 or159403-001

8/7/2019 HP / Compaq 1900

13/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





System Unit

Boards

DisplayAssembly

Mass Storage

Devices

Miscellaneous

Hardware and

Plastics Kit

Miscellaneous

Hardware and

Plastics Wedge

Ki t

Miscellaneous

Parts

Documentation

and Software

Configure to

Order

D is p la y P a n e l

A s s e m b ly

Description SparePartNumber

DisplayPanelAssemblyw/Cable13.3 inchTFT

331409-001 or140666-001

DisplayPanel

Assemblyw/Cable andConnector,12.1 inchTFT

331408-001 or

140665-001

8/7/2019 HP / Compaq 1900

14/94


Mode ls: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





System Unit

Boards

Display

Assembly

Mass StorageDevices

MiscellaneousHardware and

Plastics Kit

Miscellaneous

Hardware and

Plastics W edge

Kit

Miscellaneous

Parts

Documentation

and SoftwareConfigure to

Order

Ma s s S t o r a g e

D e v i c e s

DescriptionModel

No.

SparePart

Number

1. Diskette

Drivew/cable1.44 MB,3.5 inch

1905,

1906,1910,1915,1919&1920

331428-

001

2. LS-120Drive

1922&1925

TDB

3. Hard

Drive

4.8-GB

6.4-GB

4.0-GB

6.4-GB

10-GB

1905,

1906,1910,1915,1919,&1920

1905,1906,1910,1915,1919,&1920

1922&1925

1922&

1925

1922&1925

331415-001

331416-001

140672-001

140673-001

140674-001

DVD Drivew/InterfaceConnector

1905,1906,1910,1915,1919,&1920

1922&1925

331427-001

140682-002

24X CDDrivew/cable

1905,1906,1910,1915,

1919,&1920

1922&1925

102122-001

TBD

8/7/2019 HP / Compaq 1900

15/94


Mode ls: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





System Unit

Boards

Display

Assembly

Mass Storage

Devices

MiscellaneousHardwareand PlasticsKit

Miscellaneous

Hardware and

Plastics W edge

Ki t

Miscellaneous

Parts

Documentationand Software

Configure to Order

M i s c e l l a n e o u s

H a rd w a r e a n d

P la s t i c s K it

Spare Part Number:

331418-001(Models: 1905,1906, 1910, 1915,1919, & 1920)

Spare Part Number:140675-001(Models: 1900T,1922, 1925, 1926,1927, 1928, 1929,1930)

Description Quantity

1. DisplayPanelAssemblyHinge Cover,Left

1 each

2. DisplayPanel

AssemblyHinge Cover,Right

1 each

3. CD/DVDGuide Rails

1 each

4. PC CardPlaceholder

1 each

5. DisplayPanelAssemblyHinge Frame(Left andRight)

1 each

6.Heatspreaderwith ThermalPad

2 each

12.1 inchFPC SupportBracket(Not Shown)

1 each

KeyboardEject Latch(Not Shown)

1 each

TouchPad

Switch (NotShown)

1 each

Scroll ButtonSwitch (NotShown)

1 each

Battery EjectLatch (NotShown)

1 each

DisplayScrew HoleCovers(Not Shown)

4 each

Battery KnobSpring Coil(Not Shown)

2 each

VolumeSwitch Knob(Not Shown)

1 each

Display EjectLatch (NotShown)

1 each

RJ11 JackAssembly(Not Shown)

1 each

Rubber Feet(Not Shown) 2 each

8/7/2019 HP / Compaq 1900

16/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





System Unit

Boards

Display

Assembly

Mass Storage

Devices

Miscellaneous

Hardware

and P lastics

Kit

MiscellaneousHardware andPlastics WedgeKi t

Miscellaneous

Parts

Documentation

and SoftwareConfigure to

Order

M is c e lla n e o u s H a rd w a r e

a n d P la s t i c s W e d g e K it

Spare Part Numbers:331424-001(Models: 1905, 1906,

1910, 1915, 1919, &1920)

Spare Part Numbers:140680-001(Models: 1900T, 1922,1925, 1926, 1927,1928, 1929, 1930)

Description Quantity

1. DisketteDrive Shield 1 each

2. AlignmentPins (Left andRight)

2 each

3. DVD DriveShield

1 each

4. EjectMechanismAssemblyw/Springs(Left andRight)

2 each

5. RubberFeet

4 each

6. Wedge toPortReplicatorInterfaceBoard

1 each

7.ReinforcementBracket

1 each

Top andBottomWedge Cover(Not Shown)

331425-001

System toWedgeInterfaceBoard

1 each

Eject PlungerKnobs (NotShown)

2 each

PlungerSpring Coil(Not Shown)

2 each

8/7/2019 HP / Compaq 1900

17/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





System Unit

Boards

Display

Assembly

Mass Storage

DevicesMiscellaneous

Hardware and

Plastics Kit

Miscellaneous

Hardware and

Plastics Wedge

Kit

MiscellaneousParts

Documentationand Software

Configure to

Order

M is c e lla n e o u s P a r t s

Descr iption SparePartNumber

1. AC 45WAdapter

358976-001

2. Integrated10/100BaseTEthernet PortReplicator

331407-001 or140663-001

MiscellaneousScrew Kit(Not Shown)

331422-001or159399-

001Y CableAssembly(Not Shown)

102422-001

8/7/2019 HP / Compaq 1900

18/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





Do c u m e n t a t io n a n d S o f t w a re

System Unit

Boards

Display

Assembly

Mass Storage

Devices

Miscellaneous

Hardware and

Plastics Kit

Miscellaneous

Hardware and

Plastics Wedge

Ki t

Miscellaneous

Parts

Documentation

and Software

Configure to

Order

Description Spare Part Number

Quick Restore CD 1

US/PRMexicoAPDPRCKoreaAUSJapanUKFranceItalyBelgium

122314-001122314-

161122314-371122314-AA1122314-AD1122314-371122314-291122314-031122314-

051122314-061122314-AK1

Quick Restore CD 2

Belgium

122314-KK1

Reference Guide

Quick Reference Guide Not Available

QuickFind for Windows, North America, Latin America, AsiaPacific

Not Available

QuickFind for Windows, Europe, Middle East, Africa Not Available

QuickFind is updated monthly. To complete the QuickFind part number, add thesuffix from the table below for the desired month. If you do not specify the 3-digit suffix, the default is the current month in which the order is placed.

QuickFind Part Number SuffixSuffix Month Suffix Month

-001 January -007 July

-002 February -008 August

-003 March -009 September

-004 April -010 October

-005 May -011 November

-006 June -012 December

117894-001 US/PR

8/7/2019 HP / Compaq 1900

19/94

8/7/2019 HP / Compaq 1900

20/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models andFeatures

Controls andLights

Status Panel

Left SideComponents

Right SideComponents

Bottom ofUnit

Left Sideand TopWedgeComponents

Right SideWedgeComponents

RearConnectors

PortReplicatorConnectors

8/7/2019 HP / Compaq 1900

21/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Models and Features

Models andFeatures

Status Panel

Left Side

Components

Right Side

Components

Bottom of

Unit

Left Sideand Top

Wedge

Components

Right Side

Wedge

Components

Rear

Connectors

Port

Replicator

Connectors

Port

Replicator

Components

Power

Management

Compaq Discovery 1900 Series Portable ComputerModels

Model1926, 1927, and1928

Model1929 and 1930

Display 12. 1" TFT or 13.3TFT

13. 3" TFT

Processor Intel Celeron/400-MHzw/128K Cache

orPentium II/333-MHzw/256K Cache

Pentium II/366-MHzw/256K Cacheor

Intel Celeron/400-MHz w/128K CacheorIntel Celeron/433-MHz w/128K Cache

Hard Drive 4.8-GB or 6.4-GB 4.8-GB or 6.4-GB

Modem 56.0 Kbps PCIData/Fax

56.0 Kbps PCIData/Fax or

InternationalCD Drive 4X DVD or 24X CD-

ROM4X DVD

Configure To Order Features (CTOs)

8/7/2019 HP / Compaq 1900

22/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930



Product Description Pin A ssignments Index

Product Description

Models and

Features

Controlsand Lights

Status Panel

Left SideComponents


Bottom ofUnit



RearConnectors

PortReplicator

Connectors

PortReplicatorComponents

PowerManagement

Co n t r o ls a n d Lig h t s

Front of Unit

1. Display 9. TouchPad

2.Backlight

SwitchButton

10. LeftTouchPad

Button

3.InstantInternetAccessButton

11. Power(On/Off)Light

4.InstantSearchButton

12. Scroll(Up/Down)Button

5. Power(On/Off)Button

13. BatteryCharge Light

6. InstantE-Commerce(orFavoriteWeb site)Button

14. DisplayPanel ReleaseButton

7. InstantE-MailButton

15. RightTouchPadButton

8.Keyboard

16.IntegratedSpeakers

8/7/2019 HP / Compaq 1900

23/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models andFeatures

Controls andLights

Status Panel

Left SideComponents


Bottom ofUnit


Right Side

WedgeComponents

RearConnectors



PowerManagement

S t a t u s

P a n e l

L igh t s

1. ACAdapterLight

2. NumLock

Light3. CapsLockLight

4. ScrollLockLight

8/7/2019 HP / Compaq 1900

24/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models andFeatures

Controls andLights

Status PanelLeft SideComponents


Bottom ofUnit

Left Side andTop WedgeComponents


RearConnectors

PortReplicator

Connectors

Port

Replicator

Components

Power

Management

Le f t S id e

Co m p o n e n t s

1. SecurityLock

2. Air Vent

3. PC CardSlots

4. PC CardEject Levers

5. Hard Drive

8/7/2019 HP / Compaq 1900

25/94

8/7/2019 HP / Compaq 1900

26/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models andFeatures

Controls andLights

Status Panel

Left SideComponents


Bottom ofUnit


Right Side

WedgeComponents

RearConnectors



PowerManagement

B o t t o m

o f U n it

1. WedgeInterfaceConnector

2.KeyboardEjectSwitch

3. BatteryReleaseLever

8/7/2019 HP / Compaq 1900

27/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models andFeatures

Controls and

LightsStatus Panel

Left SideComponents


Bottom ofUnit



RearConnectors



PowerManagement

W e d g e

Co m p o n e n t s

Left Side andTop

Componentsof the

RemovableDrive Wedge

1. DVD Driveor CD ROMDrive

2. WedgeRelease Button

3. System toWedgeInterfaceConnector

4. AlignmentPins

8/7/2019 HP / Compaq 1900

28/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models andFeatures

Controls andLights

Status PanelLeft SideComponents


Bottom ofUnit



RearConnectors



PowerManagement

W e d g e

Co m p o n e n t s

Right SideComponents of

the RemovableDrive Wedge

1. WedgeReleaseButton

2. DisketteDrive or LS-120 DriveSlot

3. DisketteDrive or LS-120 DriveEjectButton

8/7/2019 HP / Compaq 1900

29/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models andFeatures

Controls andLights

Status Panel

Left SideComponents


Bottom ofUnit



RearConnectors



PowerManagement

R e a r

C o n n e c t o r s

1. Modem Jack

2. USB Port

3.Keyboard/MousePort

4. Serial Port

5. Parallel Port

6. ExternalMonitor Port

7. AC Adapter

8/7/2019 HP / Compaq 1900

30/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models andFeatures

Controls andLights

Status Panel

Left Side

ComponentsRight SideComponents

Bottom ofUnit



RearConnectors


Port

ReplicatorComponents

PowerManagement

Integrated 10/ 100BaseTEthernet Port Replicator

Connectors

1. Keyboard/Mouse

2. AC Adapter

3. Serial Port

4. Parallel Port5. External Monitor Port

6. Local Area Network (LAN)

7. Keyboard/Mouse

8. USB Port

9. MIDI/Game Pad/Joystick Port

10. Security Lock

8/7/2019 HP / Compaq 1900

31/94

8/7/2019 HP / Compaq 1900

32/94


Mode ls: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Product Description

Models and

Features

Controls andLights

Status Panel

Left SideComponents


Bottom ofUnit



RearConnectors



PowerManagement

Po w e r Ma n a g e m e n t S e t t in g s

Compaq Presario 1900 Series Portable Computers are equipped with Advanced Power Management (APM). Thismanagement system allows you to conserve battery power and customize the power saving settings to suit your individualneeds.

q Power Management Settingsq Sleepq Hibernationq Rebooting After a Lockupq Servicing Your Computer - Full Off Mode

Depending on your patterns of computer use, you can set different conditions, or Power Schemes,under which the computer will go into Sleep mode. The optional settings are Home/ Office Desk ,Portable/ Laptop , and Always On .

From the default settings, you can change the following settings.

q When the computer goes into Sleep (Standby) modeq When the screen times out and goes blankq When the hard drive slows down

NOTE: The setting for the hard drive must be less than or equal to the setting for the computer.

IMPORTANT:If you are connected to a network, Compaq recommends you set System Standby toNever .

S l e e p

Sleep mode is a low power mode, also referred to as Standby mode.

CAUTION: While in Sleep mode, your computer will maintain system information and open

files. Unsaved information will be lost if you turn off your system prior to system wake-up, or if you lose power while using the AC adapter .

H ib e r n a t io n M o d e

Hibernation mode occurs by pressing the Power button once. Your computer saves the content of your computermemory to the hard drive. This is followed by the computer turning off.

The following table shows the conditions and indicators for getting in and out of the various power modes: Sleep,Hibernation, and Off.

Mode To Start To End Indicators

Sleep Manual - Fn+F4key combination

Press any key ormove themouse

Flashing Power LED

Time-Out Default -15 minutes. If usingbattery power, systemwill not go to Sleep ifon AC power

Hibernate Manual - Press Power

Button once

Press Power

button once

No Power LED,

blank screen

Time Out Default - iflow battery or after 1hour of Sleep (systemwill not Hibernate if onAC power)

Off Perform normalWindows shutdownusing the Startbutton, or press andhold down the Powerbutton for 4 seconds

Press Powerbutton once

No Power LED,blank screen

R e b o o t i n g A f t e r a Lo c k u p

Occasionally you may encounter a non-working keyboard or a locked screen. To restart yourcomputer, press and hold down the Power button for at least four seconds. This will cause a manual shutdown. Press thePower button once to start the computer.

If the computer still does not restart, follow these steps:

1. Press the Power button and hold it for four seconds to shut the computer down.

2. Remove the battery and unplug the AC power for at least 30 seconds.

3. Reinsert the battery or reconnect AC power and press the Power button once to restart.

Fu ll O f f ( M a in P o w e r Of f ) M o d e

If you need to install or replace components in your computer, you must turn the computer offcompletely . Follow theinstructions above for putting the computer into Standard Off mode. Unplug the computer electrical cord from the outletand remove the battery if installed.

8/7/2019 HP / Compaq 1900

33/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Removal and Replacement Procedures

This section explains the removal and replacement procedures for the computer.

Electrostatic

DischargeServiceConsiderations

Cables andConnectors

Preparing theComputer for

DisassemblyBattery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor

Display PanelAssembly

Upper CPUCover withPalmrest and

TouchPad

Hard Drive/BatteryCharger Board

ConverterBoard

Low Voltage

DifferentialSignal Board

Fan Assembly

System Board

SpeakerAssembly

Disassemblingthe Wedge

DVD or CDDrive


Diskette Drive

Wedge to PortReplicatorInterfaceBoard

How to useProcessor Jig

S e r i a l

N u m b e r

Report thecomputerserialnumber toCompaqwhenrequesting

informationor orderingspareparts. Theserialnumber islocated onbottom ofunit.

8/7/2019 HP / Compaq 1900

34/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





Ele c t r o s t a t ic D is c h a r g e

A sudden discharge of static electricity from a finger or other conductor candestroy static-sensitive devices or microcircuitry. Often the spark is neitherfelt nor heard, but damage occurs. An electronic device exposed toelectrostatic discharge (ESD) may not be affected at all and will workperfectly throughout a normal cycle. Although it may function normally for awhile, then degrade in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but inmany cases, the discharge contains enough power to alter device parameters

or melt silicon junctions.

Ge n e ra t in g S t a t ic

The table shows how different activities generate static electricity at differentelectrostatic voltage levels.

Typical Electrostatic Voltages

Relative Humidity

Event 10% 40% 55%

Walking across carpet 35,000 V 15,000 V 7,500 V

Walking across vinyl floor 12,000 V 5,000 V 3,000 V

Motions of bench worker 6,000 V 800 V 400 V

Removing DIPS from plastic tubes 2,000 V 700 V 400 V

Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V

Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V

Removing bubble pack from PCBs 26,000 V 20,000 V 7,000 V

Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V

NOTE: 700 volts can degrade a product.

Return to Removal & Replacement Procedures

8/7/2019 HP / Compaq 1900

35/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Removal and Replcement Procedures

S e rv ic e Co n s id e ra t io n s

Listed below are some of the considerations that you should keep in mindduring the disassembly and assembly of the computer.

T o o l a n d S o f t w a re R e q u ire m e n t s

To service the computer, you need the following:

q 5 millimeter nut drivers (for screwlocks and standoffs)q Small, Phillips (P-Zero) screwdriver

q Small, standard screwdriverq Small, pair of tweezersq Diagnostics software

S c re w s

The screws used in the computer are not interchangeable. If an incorrectscrew is used during the reassembly process, it can damage the unit. Compaqstrongly recommends that all screws removed during disassembly be kept

with the part that was removed, then returned to their proper locations.

IMPORTANT:As each subassembly is removed from the computer, it should beplaced away from the work area to prevent damage.

Return to Removal & Replacement Procedures
http://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/2index.htmlhttp://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.htmlhttp://h18000.www1.hp.com/legal.htmlhttp://h18000.www1.hp.com/privacy.htmlhttp://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.htmlhttp://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/2index.html

8/7/2019 HP / Compaq 1900

36/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





Ca b le s a n d Co n n e c t o rs

Most cables used throughout the unit are ribbon cables. Cables must be handled withextreme care to prevent damage. Apply only the tension required to seat or unseat thecables during insertion or removal from the connector. Handle cables by the connector

whenever possible. In all cases, avoid bending, twisting, or tearing the cables, andensure that the cables are routed in such a way that they cannot be caught or snaggedby parts being removed or replaced.

C a b l e s

Use the following precautions when handling cables to avoid damage to the cable orcomputer:

q Always handle cables by their connectors.q Avoid bending, twisting, or pulling on the cables.q Apply minimum required force when seating or unseating the cables from their

connectors.q Place the cables in such a manner that they cannot be caught or snagged by parts being

removed or replaced.q Handle flex cables with extreme care; they can tear easily.

CAUTION: When serving these computers, ensure that cables are placed intheir proper location during the reassembly process. Improper cable placementcan cause severe damage to the unit.

S e le c t t h e d e s ire d i llu s t ra t io n

Removing a cable from a ZIF Connector.

The cable position for the speaker assembly.

P la s t i c P a r t s

Plastic parts can be damaged by the use of excessive force during disassembly andreassembly. When handling the plastic parts, use care. Apply pressure only at thepoints designated in the maintenance instructions.

Return to Removal & Replacement P rocedures

8/7/2019 HP / Compaq 1900

37/94

8/7/2019 HP / Compaq 1900

38/94

8/7/2019 HP / Compaq 1900

39/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919 , 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930



Product Description Pin A ssignments Index


ElectrostaticDischarge

ServiceConsiderations


PreparingtheComputerfo rDisassembly

Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor


Upper CPUCover withPalmrest andTouchPad


Converter

BoardLow VoltageDifferentialSignal Board

Fan Assembly

System Board

SpeakerAssembly


DVD or CDDrive


Diskette Drive

Wedge to PortReplicatorInterface

BoardHow to use

Processor

Jig

P re p a r in g t h e Co m p u t e r f o r Dis a s s e m b ly

Before beginning removal and replacement procedures, complete the following procedures:

1. Disconnect AC power and any external devices.

2. Remove the battery pack.

3. Remove any PC Cards.

4. Remove the wedge.

IMPORTANT:The battery pack should be removed before performing any internal maintenance onthe computer.

WARNING: Metal objects can damage the battery pack as well as the battery contacts inthe battery compartment. To prevent damage, do not allow metal objects to touch thebattery contacts. Place only the battery pack for the Compaq Presario 1900 SeriesPortable Computers into the battery compartment. Do not force the battery pack intothe bay if insertion does not occur easily.

CAUTION: Do not crush, puncture, or incinerate the battery pack. Do not open a batterypack, as this damages the pack, makes it unusable, and exposes potentially harmfulbattery components. There are no field-serviceable parts located inside the battery pack.

NOTE:

The Compaq Presario 1900 Series Portable Computers have several screws of various sizeswhich are not interchangeable. Care must be taken during reassembly to ensure that thecorrect screws are used in their correct location. During removal please keep respectivescrews with their associate sub-assembly.

8/7/2019 HP / Compaq 1900

40/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930








Preparing theComputer forDisassembly

Battery Pack

Hard Drive

Keyboard

Memory Module

Modem

Heatspreader

Processor


Upper CPU

Cover withPalmrest andTouchPad

Hard Drive/

Battery

Charger Board

Converter

Board

Low VoltageDifferential

Signal Board

Fan Assembly

System Board

Speaker

Assembly

Disassembling

the Wedge

DVD or CD

Drive

System to

Wedge

Interface

Board

Diskette Drive

Wedge to Port

Replicator

Interface

Board


R e m o v in g t h e

B a t t e r y P a c k

To remove thebattery pack,

complete thefollowing steps:

1. Prepare thecomputer for

disassembly.

2. Turn the unitover.

3. Slide the batterypack releasebutton located inthe center of thebottom of theunit.

4. Locate thebattery pack onthe right, placeyour thumb inthe groove, andpull the batterypack forwardfrom the unit.

To replace the batterypack, complete thefollowing step.

Insert the batterypack into thechassis slot

located on theright side of theunit and push in.

8/7/2019 HP / Compaq 1900

41/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor




ConverterBoard

Low VoltageDifferentialSignal Board

Fan Assembly

System Board

Speaker

AssemblyDisassemblingthe Wedge

DVD or CDDrive

System toWedgeInterface

Board

Diskette Drive




Hard Dr ive

To remove the harddrive, complete thefollowing steps:

1. Prepare thecomputer fordisassembly.

2. Turn the unitover andremove thescrew (locatedin the rightcorner) fromthe hard drive.

3. Pull the harddrive from thechassis slot.

To replace the harddrive, reverse theprevious procedures.

8/7/2019 HP / Compaq 1900

42/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor




Converter


Fan Assembly

System Board

SpeakerAssembly


DVD or CDDrive


Diskette Drive




K e y b o a r d

To remove thekeyboard, complete thefollowing steps:


2. Partially closethe unit andplace it on itsside.

3. Slide the

keyboard ejectswitch located inthe center of thebottom of theunit to the rightto release thekeyboard.

Next Step

8/7/2019 HP / Compaq 1900

43/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930






K e y b o a r d ,

c o n t i n u e d

4. Place the unit right sideup. Gently lift upthe front of thekeyboard usingtweezers.Disconnect theflex cables fromthe ZIF connectors

on the systemboard.

NOTE:

To remove acable from a ZIFconnector, liftboth corners ofthe ZIF

connector andslidesimultaneouslywith constantlight force andthen remove thecable.

5. Lift the keyboardout of the chassis.

To replace thekeyboard, reverse theabove procedures.

Return to Removal andReplacement

Procedures.

8/7/2019 HP / Compaq 1900

44/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor




ConverterBoard


Fan Assembly

System Board

SpeakerAssembly


DVD or CDDrive


Diskette DriveWedge to PortReplicatorInterfaceBoard



M e m o r y Mo d u l e

To remove thememory module,



2. Release and liftup thekeyboard.

3. Pull side leversto release thememorymodule, thenunplug thememorymodule fromthe system

board.

To replace thememory module,reverse the previousprocedures.

8/7/2019 HP / Compaq 1900

45/94

8/7/2019 HP / Compaq 1900

46/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





R e m o v in g t h e M o d e m ,

c o n t i n u e d

4. Disconnect the modem cable

from the modem and lift themodem from the chassis.

To replace the modem,reverse the previousprocedures.

Return to Removal &Replacement

Procedures.

8/7/2019 HP / Compaq 1900

47/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor


Upper CPU



ConverterBoard


Fan Assembly

System Board

SpeakerAssembly


DVD or CDDrive


Diskette Drive




H e a t s p r e a d e r

w it h T h e rm a l

Pa d

To remove theheatspreader withthermal pad,complete thefollowing steps:


2. Release and liftthe keyboard.

3. Remove fourscrews from theheatspreaderwith thermalpad and lift outof the chassis.

NOTE:

Whenreplacing theheatspreader,ensure thatthe thermalpad under theheatspreaderis properlyreplaced.

Next Step

8/7/2019 HP / Compaq 1900

48/94

8/7/2019 HP / Compaq 1900

49/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor


Upper CPU



ConverterBoard

Low Voltage

DifferentialSignal Board

Fan Assembly

System Board

SpeakerAssembly


DVD or CDDrive


Diskette Drive

Wedge to Port

ReplicatorInterfaceBoard

How to use

Processor

Jig


Fa n M o u n t in g

B ra c k e t a n d

D i s c o n n e c t i n g

t h e Fa n Ca b le

To remove theheatspreader withthermal pad,complete thefollowing steps:


disassembly.

2. Release and liftthe keyboard.

3. Remove theheatspreaderwith thermalpad.

4. Remove themodem cover.

5. Remove twoscrews from the

fan mountingbracket,disconnectfan cable, andlift out ofchassis.

To replace theheatspreader withthermal pad, reversethe previousprocedures.

Return to RemovalSequence Index

8/7/2019 HP / Compaq 1900

50/94

8/7/2019 HP / Compaq 1900

51/94

8/7/2019 HP / Compaq 1900

52/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





R e m o v in g

t h e 1 3 . 3 "

Disp lay

P a n e lA s s e m b ly ,

c o n t i n u e d

4. Open thedisplay panelassembly andremove thescrew from the

backlightcable.Disconnect thebacklight cablefrom the ZIFconnector onthe systemboard.

Next Step

8/7/2019 HP / Compaq 1900

53/94

8/7/2019 HP / Compaq 1900

54/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930






1 3 .3 " D is p la y

Pa n e l A s s e m b ly ,

c o n t i n u e d

6. Close the display panelassembly.

7. Remove the hingescrews on each sideand a clamp (rightside) on top of thebase pan assembly.

Next Step

8/7/2019 HP / Compaq 1900

55/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930






1 3 .3 " D is p la y

Pa n e l A s s e m b ly ,c o n t i n u e d

8. Remove three hingescrews (rear of unit)from each side of thebase pan assembly.

Next Step

8/7/2019 HP / Compaq 1900

56/94

8/7/2019 HP / Compaq 1900

57/94

8/7/2019 HP / Compaq 1900

58/94

8/7/2019 HP / Compaq 1900

59/94

8/7/2019 HP / Compaq 1900

60/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor



TouchPadHard Drive/BatteryCharger Board

ConverterBoard


Fan Assembly

System Board

SpeakerAssembly


DVD or CDDrive


Diskette Drive



R e m o v in g t h e Ha rd

Driv e / B a t t e ry

Ch a r g e r B o a r d

To remove the harddrive/battery chargerboard, complete the

following steps:

1. Prepare the computer fordisassembly.

2. Remove the keyboard.

3. Remove the heatspreader.

4. Remove the displayassembly with flex cables

attached.

5. Remove the Upper CPUCover withPalmrest/TouchPad/Fan.

6. Remove four screws fromthe hard drive/batterycharger board located frontcenter portion of thechassis.

To replace the harddrive/battery charger boardreverse the previousprocedures.

8/7/2019 HP / Compaq 1900

61/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,

1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor




Converter

Board


Fan Assembly

System

Board

SpeakerAssembly


DVD or CDDrive

System toWedge

InterfaceBoard

Diskette Drive


How to use

Processor Jig


C o n v e r t e r

Board

To remove the

converter board,complete the followingsteps:


disassembly.

2. Remove thekeyboard.

3. Remove thedisplay panelassembly.

4. Remove theUpper CPU cover

with PalmrestCover and

TouchPad.

5. Remove thehard drive.

6. Remove themodem.

7. Pull and lift theconverter boardfrom the systemboard connectorand remove

from the chassis.

To replace theconverter board,reverse the previousprocedures.

8/7/2019 HP / Compaq 1900

62/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930







Cables and

Connectors


Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor




Converter


Fan Assembly

System Board

SpeakerAssembly


DVD or CDDrive


Diskette Drive




Lo w V o lt a g e

D i f f e r e n t i a l

S ig n a l ( LV DS )

I n t e r f a c e

B oard

To remove the LVDSInterface Board,complete the followingsteps:


disassembly.


3. Remove theheatspreader.

4. Remove the twoscrews from theLVDS InterfaceBoard and liftfrom the chassis.

To replace the LVDSInterface Board reversethe previousprocedures.

8/7/2019 HP / Compaq 1900

63/94

8/7/2019 HP / Compaq 1900

64/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

HeatspreaderProcessor



TouchPad


ConverterBoard


Fan Assembly

SystemBoard

SpeakerAssembly


DVD or CDDrive

System toWedge

InterfaceBoard

Diskette Drive




S y s t e m B o a rd

To remove the system board,complete the following steps:

1. Prepare the computer for

disassembly.

2. Remove the keyboard.

3. Remove the display panel

assembly.

4. Remove the heatspreader.

5. Remove the processor.

Next Step

8/7/2019 HP / Compaq 1900

65/94

8/7/2019 HP / Compaq 1900

66/94

8/7/2019 HP / Compaq 1900

67/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




13. Remove the left hingebracket beforeremoving the converterboard.

14. Remove 1 screw at theright lower corner of

the converter board.

15. Lift the RJ11 connectoroff the guide postslocated on the rightside on the chassis.
http://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/2index.htmlhttp://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.htmlhttp://h18000.www1.hp.com/legal.htmlhttp://h18000.www1.hp.com/privacy.htmlhttp://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/5index.htmlhttp://h18000.www1.hp.com/athome/support/msgs/Discovery%20III/2index.html

8/7/2019 HP / Compaq 1900

68/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





Electrostatic

Discharge

Service

Considerations

Cables and

Connectors

Preparing the

Computer for

Disassembly

Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor

Display Panel

Assembly

Upper CPU

Cover w ith

Palmrest and

TouchPad

Hard Drive/

Battery

Charger Board

Converter

Board

Low Voltage

Differential

Signal Board

Fan Assembly

System Board

SpeakerAssembly


DVD or CD

Drive

System to

Wedge

Interface

Board

Diskette DriveWedge to Port

Replicator

Interface

Board



S p e a k e r

A s s e m b ly

To remove thespeaker assembly,



disassembly.


3. Remove thedisplay panel

assembly.

4. Remove theUpper CPU cover

with Palmrest

Cover and

TouchPad.

5. Remove two

screws from thespeakerassembly,disconnect thespeaker cablesfrom the systemboard, and liftout of the unit.

To replace the speakerassembly, reverse theprevious procedures.

8/7/2019 HP / Compaq 1900

69/94

8/7/2019 HP / Compaq 1900

70/94

8/7/2019 HP / Compaq 1900

71/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





D is a s s e m b lin g t h e

R e m o v a b le D riv e

W e d g e , co n t in u e d

4. Remove three screwsfrom the baseenclosure of the wedgeand lift off the wedgecover.

Next Step

8/7/2019 HP / Compaq 1900

72/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930








5. Remove two alignmentpins from the rear ofthe base enclosure ofthe wedge.

Next Step

8/7/2019 HP / Compaq 1900

73/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930


Removal Sequence Troubleshooting Battery OperationsProduct Description Pin Assignments Index





6. Remove thereinforcement bracketfrom the front of thewedge.

Next Step

8/7/2019 HP / Compaq 1900

74/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor




Converter


Fan Assembly

System Board

SpeakerAssembly


DVD or CD-ROM Drive


Diskette Drive




DV D o r CD-

R OM Driv e

To remove the CD-ROMor the DVD Drive with

shield attached,complete the followingsteps:


disassembly.

2. Disassemble thewedge.

3. Remove twoscrews at therear of the CD-ROM or DVDDrive and lift theCD-ROM or DVDDrive with shieldattached off theconnectorwedge.

To replace the CD-ROMor DVD Drive withshield attached,reverse the previousprocedures.

Next Step

8/7/2019 HP / Compaq 1900

75/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930






DVD o r CD-R OM

D riv e , c o n t in u e d

To remove the CD-ROM or

DVD Drive shield performthe following step:

4. Remove the screw whichsecure the CD-ROM or DVD

Drive shield.

To replace the CD-ROM or

DVD Drive shield, reverse theprevious procedure.

8/7/2019 HP / Compaq 1900

76/94

8/7/2019 HP / Compaq 1900

77/94

8/7/2019 HP / Compaq 1900

78/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




To remove the Diskette Driveor the LS-120 Drive shield,

perform the following step:

Remove the screw fromeach side of the

Diskette Drive or the LS-120 Drive shield and liftoff.

To replace the DisketteDrive or the LS-120Drive shield , reversethe previous procedure.

8/7/2019 HP / Compaq 1900

79/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930





Electrostatic

Discharge




Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor




ConverterBoard


Fan Assembly

System Board

Speaker

AssemblyDisassemblingthe Wedge

DVD or CDDrive


Board

Diskette Drive

Wedge toPortReplicatorInterfaceBoard

How to use

Processor Jig


W e d g e t o t h e

P o r t

R e p l i c a t o r

I n t e r f a c eBoard

To remove the Wedgeto the Port ReplicatorInterface board,complete the followingsteps:


disassembly.

2. Disassemble thewedge.

3. Remove theCD ROMDrive or theDVD Drive

with shieldattachedfrom the unit.

4. Remove theDisketteDrive or theLS-120 Drivewith shield

attachedfrom the unit.

5. Remove twostandoffs fromthe Wedge tothe PortReplicatorInterface boardand lift theboard from the

unit.

To replace the Wedgeto Port ReplicatorInterface board,reverse the previousprocedures.

8/7/2019 HP / Compaq 1900

80/94

8/7/2019 HP / Compaq 1900

81/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930









Battery Pack

Hard Drive

Keyboard

MemoryModule

Modem

Heatspreader

Processor




ConverterBoard


Fan Assembly

System Board

SpeakerAssembly


DVD or CDDrive


Board

Diskette Drive



Unlock Processor Step 1

Unlock Processor Step 2

Un lo c k in g t h e

P r o c e s s o r

Refer to the illustrations at leftto verify. Follow these steps tolock processor:

1. Place the Jig Block on theCPU frame in the lower left-hand corner. Make sure thatthe block is fully seated. Thehandle must be at a 45

degree angle (as illustrated)when installing the Jig block.

2. Twist handle 90degrees counterclockwise to unlockprocessor.

To lock processor

8/7/2019 HP / Compaq 1900

82/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Troubleshooting

PreliminarySteps

Clearing thePower-OnPassword

Power-On SelfTest (POST)

CompaqDiagnostics

DiagnosticError Codes

TroubleshootingWithoutDiagnostics

Solving MinorProblems

ContactingCompaqSupport

This section covers troubleshootinginformation for the Compaq Presario 1900Series Portable Computers. The basic steps introubleshooting include:

1. Follow thePreliminary Steps.

2. Run the Power-OnSelf-Test (POST).

3. Follow therecommendedactions described inthe diagnostictables, if you areunable to run POSTor if POST displaysan error message.

When following therecommended actions inthe Sections on POSTand Diagnostic ErrorCodesperform them inthe order listed. RerunPOST after each

recommended actionuntil the problem issolved and no errormessage occurs. Oncethe problem is solved, donot complete theremaining recommendedactions.

NOTE:

If the problem isintermittent,check thecomputer severaltimes to verifythat the problemis solved.

8/7/2019 HP / Compaq 1900

83/94


Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930




Troubleshooting

Pre lim in a ry S t e p s

Before running POST, complete the following preliminary steps:

1. If a power-on password has been established, type the password and press theEnter key. If the password is not known, clear the password.

2. Run Compaq diagnostics.

3. Turn off the computer and its external devices.

4. Disconnect any external devices that you do not want to test. Do not disconnect theprinter if you want to test it or use it to log error messages.

IMPORTANT:

If the problem only occurs when an external device isconnected to the computer, the problem may be related tothe external device or it

Documents

HP / Compaq 1900