I need some help with diagnosing a PC problem.
A couple of weeks ago, my PC started shutting down randomly or would only start up if you turned it on and off a couple of times. By starting up, I mean getting to the first beep after start up. If it made it to that, it would boot up fine.
I did remember that I had a problem in the past when my PC would shut down on it's own if the heatsink wasn't properly installed.
I opened up the PC and pressed the heatsink down to make sure it was in proper contact. This seemed to solve the problem for a couple of days, but then it started up again.
Yesterday, it took a couple of power cycles to get the PC to boot but it locked up as soon as I started to run any applications. It did this twice and then would no longer boot.
When I power on, the led on the board lights up and the fans all start up. I get no beeps at all.
I have tried refitting the heatsink with fresh thermal grase to ensure it is in good contact with the CPU.
All of the cables seem to be in correctly. I had a similar problem to this last year, which ended up with me replacing all of the PC components (under warranty).
I have a P4 3.4GHz CPU and a single 1GB Kingston memory unit. The motherboard is an ASUS P5GD1 Pro.
I've not yet stripped everything down, but I would guess that I will still just get the light and no beeps.
Before this happened, the PC had been running fine for the past 12 months. The unit has not been moved around.