Propane torch repair of Apple G3 iBook Graphics Processing Unit: Apple is no longer replacing defective logic boards, so if your screen freezes or goes blank and the GPU is responsible, you can try this. You might destroy the computer, but you might instead resurrect it.
Mine just randomly looses it's backlight. The screen us still visible but there is no brightness. Is this the gpu or the screen?
MrMoto1998 2 weeks ago
worked for half a day, re-done and is working great!
One hint...recognise this problem by pressing on left hand side of touch pad when starting up. Should work but not a permenant solution. That is where this Video comes in!
Good luck!
altomagic 2 years ago