I have an odd situation with one of my computers. I was using it and everything was fine, but then I went to work on something else leaving the computer powered on, but not doing anything. When I came back, the computer was off. I pressed the power button, no response at all. No sounds, no lights, no fans...nothing. I unplugged the computer for a bit and tried again, but still no response. I noticed that the power supply's "trickle power" led was off even when plugged into known good power (the led's always on if it's plugged in). I figured it might be a failed PSU, so I opened the case. When I opened the case I distinctly smelled the "blue smoke" that burnt electronics make. I then connected a power supply tester to the 20pin connector. When connected, the PSU powered up and the tester showed correct voltages on all the rails. I then reset the cmos and plugged the psu to power again, and tried to boot, with no response. I stripped the machine down to a "bare system" (mobo, 1 stick ram, onboard vga, cpu, psu). To my surprise, it booted right up at this point reporting that no bootable drives were found, which is correct, no drives were connected. I then plugged in my usb keyboard and entered the bios. I reset the time and some other settings. So then I tried connecting devices one at a time. It came down to the video card. If the video card is connected, the computer will not even attempt to power up. The video card heatsink was very clogged up with dust, so I cleaned it and took the heatsink off the gpu to see if the core looked burnt. The gpu looked normal to me however and the card has no smell of smoke. So removing the card "fixed" the problem, but I'm concerned that I smelled smoke, which didn't seem to have come from the "failed" component. I have two theories besides just having a bad video card. First, I still suspect the power supply, after all it is a 250W HiPro. I'm thinking that maybe removing the card put less load on the power supply allowing the system to work without it. My second theory is that maybe part of the motherboard involving the pci-e slot fried. I think my next plan of action is to try the graphics card on another "crap box" of mine to see if it works or not. I guess I'm just wondering if anyone has any other ideas or comments about it, or if anyone has had anything similar happen. -- Cliffs (for those who won't read :wave -System would not power on. -Removing video card allows post and boot. -Burnt smell in computer, but video card not burnt. -Don't really think the real problem is video card. -Theories on why removing card "fixes" computer. Edit: Added Picture of 6600GT.