We have many computer models with two X300 cards each for a total of 7 stations.  We use windows deployment server(WDS) to capture the image from a working machine and copy the image to other computers (exactly similar hardware as the image).  Everything had been working perfectly so far until we worked with a Dell Optiplex 755.  When a image(previously captured from another 755) is installed, only one X300 card works.  The 2nd X300 card is being detected(it shows up on the device manager and also the green light on the Black multi-user box lights up implying it is getting power) but none of the monitors connected to that card get a signal.

I have tried working with the BIOS, reinstalled the ncomputing software but to no luck.  I also made sure both the cards were not faulty.  The card in that PCI slot just wont work.  Any ideas/help on whats going on?