VGA but no DVI?

I have a 975x Power Up Edition mobo and was running a Geforce FX1400 dual screen till the card died. So far, I have tried an MSI card (Radeon x1650) and another Radeon X4350 but can't get a DVI signal. I can get VGA out of both ports. All drivers etc. updated but still no DVI 
The cable, which has all pins, and monitor work OK on another PC with a Geforce GT 610. I'm using same cables and monitors as worked with the FX1400.
Here's what Catalyst says about the h/w & s/w:
http://www.shibari.co/misc/radeon1.jpg
http://www.shibari.co/misc/radeon2.jpg
Any ideas?

Are you on the proper channel on your TV? I know it seems stupid, but it happens.

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