Hi,
Although this thread is a bit old, I am really curious if anybody actually find a solution to the problem described by Ikvee.
I am experiencing exactly the same problem recently with my sisters iBook G4 14inch (late 2005). White Screen, external video OK.
Although we are not ultimately interested in repair, I am just super curious what the cause migth be. BTW: I also changed the LCD, which did not solve it.
Did anyone find an explaination in the meantime??
Cheers, Chris