My computer has been working great for several months, when one day I noticed the fans/HDs were running but the display signal would not return when I wiggled the mouse (optical; there was no red light underneath); the computer had been left running beforehand. Anyway, I manually reset it and it booted back up just fine. A week later however, the computer did the exact same thing, and now it acts like it is booting up (fans etc. start) but there is no display, every time I try. Also there is a fancy blue light that shines out the front of the case that also won't light up anymore.
I ruled out the monitor (using another computer). I pulled out my agp video card and tried the onboard video. No luck. I tried to reset CMOS by pulling out the battery for a few minutes. nothing. I disconnected and reconnected everything. Nothing. Then I diconnected everything except psu, cpu, ram. And after than I tried a different cpu in the motherboard, and it still won't boot up . .
The only thing I can think of would be either the motherboard or the psu. Any suggestions?