I have a 20" G5 monitor iSight that I've been wanting to make a monitor for a while, but I ran into a roadblock as my LCD is LVDS and not TMDS. I thought all hope was lost, but after extensive research I found out that even though it uses LVDS it can still be just wired to DVI. Apparently there is a board on the inside of the display itself, as was described in this post on here:
http://www.dremeljunkie.com/2011/07/20-lcds-signaling-inverters-and-pinouts.html
"TMDS is the type of signal that DVI and HDMI cables use. Nothing gets converted, its just that the wires get arranged in the right sequence and POWER is added. Inside the LCD casing itself there is a Texas Instruments chip that allows the monitor to utilize the TMDS signal. Therefore, ALL of the LCDs in the above computers can be connected directly to any TMDS signal - meaning any source that sends a signal over a DVI or HDMI cable.
Panel Names: (May not be complete) - All TMDS compliant
iMac G4 17" - LG LM171W02(A4)
iMac G4 20" - IDTech M201Z2-M01
iMac G5 20" - LG LM201W01(A5)(K1, K2, or K3)
Aluminum Apple Cinema Display 20" - LG LM201W01(A6)(K1)"
My machine is fully working, however I would just like to use it as an external monitor.
I've got it all taken apart, except for the PSU and built in inverter. Just have to wait for a Female DVI connector, and then I will see if I can get it up and running. Hopefully this will work, and I will post results once I have completed (or failed) the project.
I hope I can help anyone who is having a similar problem as I am!