Thing is there is no display - so I can't see to do that. I've replaced the crd with an X800 today which is working well - but it'd be great to get to the bottom of the problem, clearly the old card works - it just needs the CW there as well????
Jeez, I misunderstood. So you only have one Apple display hooked up and as soon as you uninstall the CW card, it stops displaying? Wow. What a bummer and totally strange. It sounds to me like it must be putting your card into a display mode that the Cinema Display doesn't support. Have you tried downloading newer drivers for your graphics card? You said zapping PRAM doesn't restore it? DId you zap before or after the uninstall?