Originally Posted by McSteel
As i said, you could start by checking for shorts on the PCI-E connector pins first. The top row is all GND, and the bottom row is 3 x 12V + 1 x Sense/GND. You want to check if there's an immediate short because you'll want to know if any of the VRM input capacitors have failed. This could mean they were defective, or it could mean there was a feedback surge due to a failed MOSFET that knocked one or more caps out. If there are no immediate shorts, then the problem lies elsewhere, and could easily be a failure of a driver IC, a PWM control IC, or even of the GPU itself.
What problems does the GTX280 have?
The 280 will display fine, but spool up to 100% as windows is loading and then kill the display. my onboard debug shows that the system is booting fine, but the gpu isnt displaying anything. I have a hunch this card overheated once or twice in its life. Thinking about baking it.