Went to boot my computer this morning and the computer did something its never done in the 5 years I've had it. It powers up fine but the Blue service LED's on the mobo blink and no video comes on the monitor.
I took a video to help illustrate my problem. I've been searching the web for hours now for this problem and have came up with nothing. I'm not sure if my board is fried or the 8800gtx is fried.
I would suggest pulling everything apart and then reinstalling it, including the CPU HS/F
It is possible that a connection has gotten loose, and it is also possible that after 5 years of use the Thermal Compound has dried out and heat from the CPU isn't transferring properly and the PC isn't posting to keep from damaging the CPU.
Keep in mind that if you do remove the heatsink you will have to replace the thermal compound with new compound and you will have to clean both the CPU and hte bottom of the heatsink