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Problem using nVidia dual mode with EVGA GTX 280
I'm hoping someone can help me with this.
I had a EVGA GTX 280 which was sent back for repairs because I thought it was causing a problem. A new card was shipped back to me.
Among other things, I use my computer using the nVidia two-monitor setup, using "extend mode" so both monitors in effect become a much wider screen. My old card was set up this way.
With the replacement card, looking at the computer as seen from the rear, the DVI output on the "right" (furthest from the motherboard) works fine, and as far as I can tell, there are no issues.
However, there is nothing I can do to get any kind of image from the other DVI output. I've tried "dual mode", "clone mode", and just hooking up a single cable only to that DVI connector. I've tried two different monitors, and two different cables.
Is there some "trick" to turn on that other DVI connector, or is this new card defective? (I think I had a similar problem years ago, and a friend fixed it very easily, but I don't remember what he did. If it means anything, the video card I was using while this one was being repaired worked fine in dual-channel mode. The drivers were uninstalled when we removed the old card, and the new drivers were installed after the 280 was connected to the system.