Got another problem here. I was having some stability problems after a clean format (some windows update's couldn't be installed etc.). I was going to run memtest, so I put my case horizontaly (i was going to cool it passive because I can't sleep when my pc is on) I hit the power button and everything worked but the screen didn't respond (no signal). I also didn't hear him boot windows.
I tried:
- clear cmos
- unplugged some other devices (tv-card, second hard disk, ...)
- used the onboard videocard to boot
- tried to boot with 1 memstick on diffrent banks
- cpu and memory only

It's not beeping, the led on the motherboard works. I don't get it. Bios corrupt (the post screen hangs sometimes)? mobo dead? cpu dead?

Ok it seems that my monitor is dead. :^D :(

Ok I got 2 problems now.

My dad's pc freezes after a couple of minutes, no mather where (memtest, windows, ...) Hooked up my OCZ here, It ran stable, I shut him down. A couple of hours later, I start him up again and it freezes again.

And my PC doesn't boot anymore. Again a black screen. Really desperate here. :(:(