Help with g4 compatibility with apple display monitor

http://store.apple.com/us/product/M8661LL/B?fnode=MTY1NDA5OQ&mco=MTA4MzU1OTI

 

Boy, that's expensive.

 

There is another option you have..

There is actually a different option you can go. I think its even better, because you will get better graphic performance out of it. There have been a lot of G4 machines around, so it should be easy to find an original apple graphics card that has an ADC port. This way you will get a (usually) better GPU card with no need of purchasing the expensive ADC adapter.
Important:
Depending on which model you have, you need to find out if you have power on the G4 logicboard. The MDD models have them, however some earlier models do not have the power on the AGP port, so the ADC would also not work because of that. You can find the power port in front of the AGP slot/pins.
Most AGP ports/cards have a small black pin extension in front of the bigger AGP slot. This is where the power is drawn. Earlier models do not have that on the logicboard and therefor will not work. One card that would work is an Apple ATI 9000 card with ADC port (original an G4 MDD card) if you have that black power port.

Good luck