compaq wont start up..
Posted 24 June 2011 - 03:21 AM
Posted 24 June 2011 - 06:58 AM
A power supply has to produce +12V, +5V and +3.3V. Fans and lights run off the 12V. But at this point, we don't know if the other voltages are being produced. I always want to start from the beginning by ensuring I have good power. So I start by swapping in a spare, known good PSU (power supply unit). If do not have one, or cannot borrow one, most repair shops will test PSUs for a nominal fee.
But, before spending money, I would swap monitors to make sure it is not your monitor that is failing to come on.
Other than that, I am afraid it could be a number of things, which makes troubleshooting harder. This could be caused by bad RAM, bad CPU or even a bad motherboard.
Do you know why the computer was set aside for so long?
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