Monitor doesn't receive signal once I start a game

[Braduman]

Hey guys, I've had my computer for about 2 years now, never had problems like this before.  Every time I start up A game the screen blacks out after just a few seconds I've tried unplugging the cords and that doesn't help.  I've also tried reseating the graphics card and that seemed to make it worse.

My computers specs are:
CPU: intel q6600 2.4gh  quad core
Graphics:nvidea 9800gtx
Asus p5n E motherboard
4gb ddr2 800 ram

[Computer_Commando]

What are temps on video card?  Download, install and run this:  http://www.cpuid.com/softwares/hwmonitor.html

[Braduman]

I'm sorry it got to the point it won't even boot past the bios before blacking out, however I did try using my friends video card and it worked fine so it must be the video card