I believed that the LCD itself would not pose a problem and I posted the TMDS to DVI pinout in this post, though had not been able to confirm it until now. And yes it does work.
|The Apple Logo on the ID Tech 20" Panel
When I finished my 17" STEP by STEP GUIDE. I knew I was going to get questions regarding to 20" and if such an easy approach could be used. However, because of my cinema display mod, I now had information about the inverter that I had previously lacked. I have never owned a working 20" iMac G4 and was therefore making (supposedly) educated guesses, while trying to figure out the inverter. A damaged inverter later, I realized this approach was not great. With a working inverter via the cinema display's controller, I finally had voltages to check and use as a guide.
So, using my new technique, once the pins were free (The LCD was wired up in just a few minutes). I then tried a few different things using my new information. And for the first time I had a 20" iMac G4's native LCD and inverter display a backlit video signal through the neck (hooked up to a mac mini via DVI) using only wires, connectors and power supplies. The power scheme is much more complex than the 17", this is due to the higher power requirements of the 20" LCD. However, this uses the same method for the LCD as the 17" mod and is quite reproducible.
For those who have followed this blog, you know that this has always been a frustrating shortcoming for me. It has been a long time, but I am so excited to be able to share this with everyone.
|Identified Monitor as "iMac"
Again, thanks for reading!