Negative Color on Apple 17" DVI to ADC Box

Hello all, I would like to get any help with my 17" Apple LCDs. I have a G5 2.0 with a ATI 9600 Pro 64 megs video card, one ADC and one DVI port. I have the Apple converter DVI to ADC with both USB and DVI cable. It adds power to the Monitors also.
I have two 17 Monitors 3 month apart when I purchased them.
One works (converts) fine on my G5 and MacBook Pro 17", even on a PC with an ATI Wonder Card, (one DVI port one VGA), but the other Monitor will not!
The display looks, well best described as Negative, like a photo (film) negative. When I directly plug the Apple Monitor Cable into my G5 ATI 9600 Pro ADC port its completely fine? It returns to a normal Display.
I am completely puzzled!
Any thoughts would be very well received. Cheers DonH

I have tried the key commands when connected to my MacBook Pro 17" but it sends the Mac Pro into negative mode! The same with two monitor set upon my G5. It has to be the Monitor? I have two 17" purchased 3 month apart. The other is fine even connected to my PC and using the Apple converter.
I think your problem is a defective DVI to ADC adapter, since your display works correctly from a computer with ADC. There have been others with the same problem with the adapter. A single bit error can cause color inversion with the encoding used for DVI video.

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