I have a G4 A1138 that works except for the backlight (shining a flashlight shows the apple logo on the screen and text from a bad boot crash). I just replaced the power inverter board hoping it would be a cheap easy fix and no luck. Since this is the higher resolution screen an LCD replacement might be costly and you never know if the backlight is good or not I was wondering if anybody ever tried replacing the bulb? They seem to be on sale shipped for $20 or less with ends soldered on.