24" LED Cinema Display not working with Mac Pro

I have a Mac Pro (2 x 2.4 GHz Quad-Core, model identifier MacPro5,1) purchased in late 2010 and a 24" LED Cinema Display. The Mac Pro has three video ports--a full-sized DVI and two mini DVI. When I plug the Cinema Display into either of the mini DVI ports, I cannot get a picture, although the iSight camera works fine. If I plug another monitor into the full-sized DVI port the computer believes that is the only monitor. The Cinema Display works fine with my MacBook, so there is nothing physically wrong with it.
Is it not possible to use this monitor with a Mac Pro without an adapter, even though the Mac Pro does have mini DVI ports?

Atiya wrote:
I have a Mac Pro (2 x 2.4 GHz Quad-Core, model identifier MacPro5,1) purchased in late 2010 and a 24" LED Cinema Display. The Mac Pro has three video ports--a full-sized DVI and two mini DVI. When I plug the Cinema Display into either of the mini DVI ports, I cannot get a picture, although the iSight camera works fine. If I plug another monitor into the full-sized DVI port the computer believes that is the only monitor. The Cinema Display works fine with my MacBook, so there is nothing physically wrong with it.
Is it not possible to use this monitor with a Mac Pro without an adapter, even though the Mac Pro does have mini DVI ports?
I use a 24" LED with my Mac Pro. Works a treat!
Does this help you? http://support.apple.com/kb/TS2400
EZ Jim
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Atiya wrote:
I have a Mac Pro (2 x 2.4 GHz Quad-Core, model identifier MacPro5,1) purchased in late 2010 and a 24" LED Cinema Display. The Mac Pro has three video ports--a full-sized DVI and two mini DVI. When I plug the Cinema Display into either of the mini DVI ports, I cannot get a picture, although the iSight camera works fine. If I plug another monitor into the full-sized DVI port the computer believes that is the only monitor. The Cinema Display works fine with my MacBook, so there is nothing physically wrong with it.
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