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How To Fix A Machine That Refuses To Turn On
Check the power cable. It may seem simple, but double-check that the power cable is plugged in and the outlet is working.Plug the computer directly into the wall to see if your surge protector or power strip is the cause of the problem.If you are using a laptop, make sure that thepower adapter is securely connected.
Remove your laptop's battery and connect the power adapter. You can run your laptop without a battery inserted as long as you are plugged into a power source. If your laptop turns on when the battery is removed, something is wrong with the battery and you should contact the manufacturer for a replacement.
Try a different monitor. If your computer is starting up but you can't see anything, there could be something wrong with your monitor. Double-check the monitor's connection, and try plugging in a different monitor if possible.
Listen to the beep code. If you're "lucky", your computer will issue a series of beeps when it fails to turn on. Look up your motherboard's manufacturer and find the beep code translations. Knowing what the codes mean will make tracking down the problem much easier . Beep codes are unfortunately different for every manufacturer, so you'll need to search for them yourself.
Check that all of your hardware is detected. Your BIOS will display all of your connected hardware in the MONITOR, HARDWARE, or SYSTEM section. Check to see that hard drive is displaying properly . If hard drive is not showing up, try replacing the cable inside the computer.
Reseat all of your components. Open computer and reseat graphics card, RAM modules, and all of cable connections. If anything has come loose, there's a chance that it's disrupting the POST sequence . You can try reseating processor as well, but this is usually a much more difficult task, and likely isn't the cause of the problem. It also increases the chances of damaging the processor, which will render computer completely inoperable.