Computer Crash Diagnosis?

My homebuilt, scrupulously-maintained PC, which I built four years ago, just
crashed. Yesterday morning the monitor suddently clicked off, the hard drive
churned, and that was that. Now, when I switch the thing on, the hard drive
light flares as normal but the monitor never wakes up and the computer never
boots. (I know it doesn't boot because a laptop networked with it can't
access shared files.)

Here are the specs: Intel Pentium 4 2.4 GHz, Soyo 645D Dragon Lite
motherboard, 512 MB RAM.

I'm thinking the problem is either (1) the motherboard and/or processor, (2)
the video card, or (3) the power supply, but I can't tell anything by just
looking at these components. Is there any way to pinpoint the problem? (And,
no, I don't have a second PC to use as a test bed.) Thanks to anyone who can
offer advice.


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Relevant Pages

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