I just started over with a fresh windows 7 64bit install...im sure this is an easy fix, just no luck searching it.
I just went through this. I think everything that could possibly go wrong went wrong. Here are some things to do.
If you have a second monitor, plug it into one of the other cards and reboot. If it becomes available, you're in luck! All you need is a "dummy" plug. Use the layout here
and the suggestion for Radio Shack 68ohm and pics here
to make one with the VGA adapters that came with your cards. One thing though: kink the end of the resistor so that it is certain to touch the walls of the adapter. I didn't do this so my dummy plugs didn't work.
If it's not resolved, next, if there is a molex connector on the motherboard and you have a molex plugged into it, remove the plug. I don't know why but this made it so my MB would only see one card. Only use the power that plugs directly into the cards.
If that doesn't solve it, then you are in for a bit of work. First. Take out all of the cards and put them in one at a time into each slot and reboot to ensure that the slot is working. If there are any slots that don't work, you might have a defective motherboard.
After this, put in all of the cards. Install the latest drivers for your motherboard. Wipe out all ATI software and drivers using these instructions
. Reinstall catalyst.
At this point it should work.
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