here is the thread:
https://forums.macrumors.com/threads/1155671/
and the link to the ifixit guide to that mod... i'm sure it will work for the 15 inch version as well!
http://www.ifixit.com/Guide/PowerBook+G4+Aluminum+12-Inch+1-1.5+GHz+LCD+panel+upgrade/3117/1
good luck!
I should try this. What is the currently recommended panel to get, anyone knows?