I have a powerbook g4 titanium dvi. It has your standard backlight problem (screen on, viewable with flashlight) I have replaced various parts, including inverter and cables. The only thing remaining is the logic board. Things like switching back and forth from mirrored display mode, and plugging and unplugging an external display turns the backlight on for a second or less.
My question is this, is there any way to get the light on without replacing the logic board? Any hacks, hardware or software (command line?) would be appreciated.