Monitor Won't turn on.

[Busdriver101]

Ok we had a working computer. with a Foxconn Mobo with NO onboard graphics...

it was running on a 7800 Nvidia...and we took that out and put in a 9800 BFG nvidia.....didint show up on the monitor...so we put the 7800 back in and it worked..so we took off the drivers of the 7800...and now NEITHER will work..i've tryed Clearing the CMOS but nothing..any ideas guys?

and because i can't see anything i can't change anything in the bios.

 

[MustangSVT]

make sure you've attached power line from psu to the videocard.

 

[Busdriver101]

I have them pluged in.

 

[MustangSVT]

disconnect hdds , optical drives , floppy, only have cpu + memory (1 stick) and video card on mobo. make sure computer powers up (led, fans) and tell us if there are any beeps.

make sure monitor does get power too.