suspect broken mobo or graphics card not sure ???

Ok I had this working fine, then the fan on my GPU failed so I swopped it for another which was an HIS excaliber and then found out it didnt fit cos of the artic cooler I plugged it into the 2nd slot but that didnt work as I kept losing the picture on the TFT for some reason.

I took that card back and now have an 6800 ultra which fits fine in the first slot but doesnt align properly with the locking bolts, The Ultra worked fine on the first boot but when I tried to screw it all in I lost the picture again and now cant get it back on either pci slot!

This leads me to belive I now have a knackered mobo.
I've checked the GPU and I've check the slots theres nothing there that shouldnt be there so now I really don't know what to do.
Its not the monitor as I've tried to and I've tried different wires

I cant do anything with the pc as I cant get a screen to work with.

Do I have to RMA this ? want clarification as dont want to strip it all down and not have it work !

specs
coolermaster stacker
tagan 480 Watt
6800 Ultra
DFI Lanparty Ultra D
3200xl corsair platinum am
raptor 76 gb
maxtor 300gb
audigy 2