comp runs, no video signal

[jasonalwaysready]

I built my computer a few days ago, and i was able to start it up, i installed vista, updated the os and all drivers. after the last of a dozen restarts, it went for about 4 seconds, restarted itself, and now the monitor isnt receiving a signal.

everything powers up, i used a backup video card and that doesnt work either.

any ideas whats wrong?

GIGABYTE GA-P35-DS3L LGA 775 Intel P35 ATX All Solid Capacitor Intel Motherboard - Retail
ASUS EN9600GT/HTDI/512M GeForce 9600GT 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail
CORSAIR CMPSU-550VX 550W ATX12V V2.2 Power Supply - Retail
Intel Core 2 Quad Q6600 Kentsfield 2.4GHz LGA 775 Quad-Core Processor Model BX80562Q6600 - Retail
G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model F2-8500CL5D-4GBPK - Retail
Seagate Barracuda ES.2 ST3250310NS 250GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
COOLER MASTER RR-CCH-L9U1-GP 92mm Hyper TX2 CPU Cooler - Retail (N82E16835103031)

thanks

[Snake91839]

Maybe it's the PCI-E bus. No real way to test, so I would RMA the Mobo and then see if it does it with the new one.

[Mak213]

Does it have onboard Video to test it with? Also with the 2nd video card could have been a driver issue. Since they were not identical cards could have caused a driver conflict.

[jasonalwaysready]

no onboard video. i cleared the cmos and that didnt help either...

im thinking its the mb, but its funny that it worked for a few hours, and then failed on me...