I was busy copying the latest Diggnation episode to my iPod with DiskAid and some music on in the background (with WMP). Suddenly, everything on the screen freezes, but the music keeps playing until the end of the track. Rather concerned, I tried to start task manager, nothing happened. I held down the power button, didn't switch off. So I unplug the power cable, plug it back in and the PSU fan and heatsink fan start up (I hadn't pressed the power button), very loudly but nothing else happens. No visual output at all. Then the BIOS beeps (after about 20 seconds of fans) 'beeee beep beep' and then the fans just carry on. I unplug it again, then remove the HDDs and the DVD drive. Try again, nothing but fans and the same beep. I then remove the graphics card and plug it in. Same, but no beeps. I then switch the graphics card, replace the BIOS battery and plug it in. The fans don't automatically start this time, but when I press the power button, they do. I then remove the RAM. Same result again.
Any ideas on what is wrong with it? This is my primary computer and the next best computer I have is an immovable HP ZV5000 laptop with just 512MB RAM and a dodgy HDD, so it is pretty essential that this works again :S
I built it myself out of parts from eBay etc. about a year ago but only got it working about two months ago.
Any help is greatly appreciated