Compaq mobo + 9600 pro = no boot

[sandmtrailboss]

My freind's pc basically will give us a blank screen with a 9600 pro installed. I tried going into the bios and disabling the onboard and nothing. It used to be my mobo and I ran a gforce 2 in it without haveing boot problems when first installed. We also tried installing the drivers w/ the monitor plugged into the onboard video. Specs are a compaq mobo with 1.3 celeron , 512 sdram , and an attempt to install 9600 pro. Help is greatly appreciated!