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Chapter 8Chapter 8 Basic Computer Basic Computer MaintenanceMaintenance
8.1Preventive Maintenance 8.2Monitoring System Performance 8.3Symptom, Cause and Solution 8.4Safety Issues
8.18.1 Preventive MaintenancePreventive MaintenanceSurge protector
inserted in AC utility line and telephone line
prevent transients (damage to electronic equipment from voltage spikes)
a small box with utility outlets, a power switch and a 3-wire cord
used with semiconductor-based hardware
printer, monitor, external disk drives, modem
8.18.1 Preventive MaintenancePreventive MaintenanceSurge suppressor
prevent the peak AC voltage from going above a certain level
use a 3-wire AC power connection
8.18.1 Preventive MaintenancePreventive MaintenanceKeep all liquids away
Get grounded before handling hardware
Avoid installing components when the computer is in operation
Defragment the hard drive regularly
Scan the disk regularly for errors
8.18.1 Preventive MaintenancePreventive MaintenanceAvoid removing any floppy disks from the driver when the indicating lights are on.
Avoid switching off the computer when the hard disk lights are on.
Uninstall software by“Add / Remove Program” function in Control Panel
uninstall function of applications
8.18.1 Preventive MaintenancePreventive MaintenanceBack up the system on a regular basis
by optical storage peripherals
Reserve sufficient space for computer to dissipate heat
8.18.1 Preventive MaintenancePreventive MaintenanceClean the computer regularly
Liquid detergent: clean the outside of computer
Brush: remove dust
8.18.1 Preventive MaintenancePreventive MaintenanceClean the computer regularly
Canned compressed air: remove dust inside the computer
Vacuum cleaner: remove dust and dirt inside the computer
8.18.1 Preventive MaintenancePreventive MaintenanceClean the computer regularly
Contact cleaner: clean the conducting points and connectors between hardware
8.28.2 Monitoring System PerformanceMonitoring System PerformanceProblems encounter after system operates for some time
System slow down at startup
Take a long time to switch between programs
Programs take long time to load
Windows Task Manager is used to monitor the system performance
8.3 Symptom, Cause and Solution8.3 Symptom, Cause and SolutionProblem 1
SymptomComputer takes a long time to load the OS
Possible causeMany programs loads into Windows during start-up
Verify assumptionObserve how many applications are loaded by Windows Task Manager
SolutionDelete programs in “Start Menu” folder
8.3 Symptom, Cause and Solution8.3 Symptom, Cause and SolutionProblem 2
SymptomComputer takes a long time to switch between programs
Possible causeNot enough physical memory in the system
Verify assumptionUse the system monitor
SolutionAdd additional memory if necessary
Replace smaller capacity memory with a larger one
8.48.4 Safety IssuesSafety IssuesElectrical safety
Turn off the power to PC and peripherals before cleaning
Disconnect the PC from power socket when accessing the inside of PC case
Avoid leaving the case open with the power on
Never disassemble the monitor
8.48.4 Safety IssuesSafety IssuesMechanical safety
Be careful when working
Never put anything into running cooling fan
Laser safetyNever disassemble optical drives (e.g. CD-ROM and DVD-ROM)
8.48.4 Safety IssuesSafety IssuesGood work habits
Plan your work
Organise and prepare the workplace
Handle everything with care
Never use excessive force
ENDEND
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