OK, here's the situation:
I walked away from my PC while playing WoW. Came back 2 minutes later to a black screen (monitor sleeping, won't kick back on....and I don't use the screen saver/hibernate). Tried all the normal key combos...alt-f4, alt-tab, alt-ctrl-del to no avail. Hit the power button for a restart. At restart, fans kick on, drives spin up, and keyboard blinks. However, I did not get the 1 customary short beep, and the monitor never came on. After another restart I started to troubleshoot, and here is what I did:
Unplugged everything aside from the 20+4 going to the mobo, left only 1 ram chip in, and left the vidcard in (no onboard) and tried a restart...nothing
Tried another vidcard...nothing
Reset CMOS and took out battery, tests good at 3.05v
Removed the power supply and tested all the pins on the 20 and 4-pin connectors, all test out at the appropriate voltages.
I only got it to the BIOS start screen 2 times, and both times were after I was not tinkering with it for at least half an hour. First time it froze right at the BIOS splash screen, the second time it made it to the screen stating CMOS had been reset and that defaults were restored, and upon selecting to go into setup, it froze.
Heat is not an issue as nothing is overclocked, and it's only about 50 degrees Fahrenheit in my computer room.
P4 3GHz processor....i think, iirc it's the highest the P4 series went.
Thermaltake 500w power supply
1gig kingston ram
Not sure if any other info is req'd as the computer should at LEAST POST with the bare bones listed.
Any help is appreciated.