pc wont boot to windows with video card plugged in,my pc suddenly wont boot to windows few hours after i use it this morning.what happens is,when i try to switch on my pc this afternoon,i noticed that when i pressed the power button,the light indicator for power and process did not turn on,after few seconds it turn on but no output in my monitor,and after 3 to 8 seconds it just reboot it self.and same thing happen again with the light indicator,and just repeat the same process.but after i removed my video card and used my onboard video card.it booted normally.what do you think is the problem with my video card.i checked for any blown capacitors on the video card but,i did not see any. please help me resolve the problem.