After rebooting my IBook G4, the desktop came up as a negative image. The Apple Support World suggested reversing the Preferences>Universal>Image which added some color and also attaching it to an external monitor. The monitor image was perfect and the diagnosis was either the Image Inverter or, more expensive, the Display was bad. So I decided to try the lesser or the two cost-wise evils.
Ifixit's service was incredible. I ordered the Inverter on the night of Nov. 1, it was shipped the 2nd and I received it, in Michigan, on the 4th. I was totally amazed. I used a "lab spatula" to pry apart the bezels and it worked perfectly. It is very thin, sharp and strong. The process went off without a hitch and I interrupted myself several times to keep the pace slow and methodical. I used just under 2 hours but it could have been done in 1 hour. No one should be afraid to undertake this repair. But, alas, it did not resolve the problem and I think the Green portion of RBG is out. The desktop is darkish, and the only colors are harsh reds and some blues.
The iFixit instructions were clear, concise and easily followed, except for the part about the screw next to the hinge and the small spacer under the screw. There were screws next to both hinges and I did not find a spacer. Any GOOD hardware store will have a 1.5mm hex key, in the area where they have specialty parts, for about $.70. Lastly, the repair instructions should suggest replacing the outside cover by starting at what would be the top of the monitor and snapping the "hinge" edge in place as the last part of that operation.