i ve got D975xbx2 board and nvidia quadro fx570 video card....from few days m trying to start my computer but its displaying black screen so i thought it must be BIOS problem so i reset it... i ve check after reseting BIOS by turning on, off num lock...it was respoding that means prblm is not with board(i guess so ) ..but problem remain same... i assembled everything again ...cables,peripherals etc...but nothings change...i think video card is not working properly.... how to check it... i don't have another pc to check on it...pls help me out...!!!!