I have an extra Apple 17-inch flat screen CRT (the one with the clear case) and want to use it as a second monitor. My video card (Radeon 9000) has one ADC connector and one DVI connector. Apple now sells a DVI to ADC adapter. I called the Chicago Apple Store and the guy I talked to asked the "geniuses" at the "Genius Bar" if this adapter would support my monitor. They said yes so I bought the adapter.
It doesn't work. Investigation shows that the analog signals (R, G, B, and syncs) are not carried through from the DVI input to the ADC output. The DVI input connector does not even have the four pins for RGB and Hsync. Apparently Apple only wishes to support their digital monitors. I really do not feel like buying an LCD studio display; too expensive. And I really like this monitor; it's a great monitor IMO.
I want to hack the adapter to bring the analog signals through. Since the adapter's DVI input plug is missing the pins, my plan is to buy a DVI-analog to DVI-analog cable from Mouser and chop off the adapter's original connector, then wire up one end of the purchased cable in its place. Next I would use some of the shielded cable to run the RGB and Vsync and Hync signals into the box and to the appropriate pins on the ADC output connector.
Details of the pinouts on the ADC and DVI connectors and a picture of the adapter can be found at: http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintosh_CPUs-G5/PowerMacG5/3Input-Output/chapter_4_section_12.html
Some questions I hope someone more experienced can answer:
(1) How are these little white cases that Apple has been using for its accessories lately put together? Glue, snap, or what? What is the best way to open the case hopefully without mangling it too much?
(2) What is the potential for interference between the RGB and sync signals? Do I have to run the shielding as close to the ADC connector as possible or will an inch or so of unshielded wire sticking out be OK?
(3) Am I overlooking something obvious here? Does this have a good chance of success?