In order to improve the performance of my Power Mac G4 933 MHz (Quicksilver 2002), I have recently purchased an ATI Radeon 9800 256Mb AGP graphics card from ebay. In order to use this with my 17" LCD Cinema Display, I am trying to use an Apple DVI to ADV adapter which I purchased from ebay a while ago, in anticipation of upgrading the graphics card.
The problem is then when the new graphics card is fitted, and the adapter used, I am not getting any display on the display. The monitor is receiving power, as the power light comes on, and the USB mouse and keyboard pass through works fine too, so the adapter is doing some of the things it should, but doesn't seem to be carrying the video signal properly.
In order to test things, I borrowed a PC from a friend along with the DVI monitor he uses. The DVI monitor worked fine with the new graphics card, but, as with the Mac, the adapter wouldn't display the video from the PC when I tried the adapter's DVI cable with this.
Does this mean that the adapter is broken? It seems to me the the graphics card is working fine. Does the adapter have any known faults or intermittent problems that this could be related to?
Are the any known compatibility issues with this set-up that could explain the problem? If so, is there away to get around this? I would love to be able to enjoy better graphics under OS X 10.5, and would really appreciate any advice you may be able to offer to help me with this issue.
Many thanks in anticipation,