i have had my 8830 last may. i noticed last night while trying to dial in the dark that the keyboard nor the trackball was not lit. i have checked screen/keyboard settings but they still won't light. i read in other forums that some have similar experience after upgrading to v 4.5. i remember upgrading to v 4.5.
help!
I don't know if this helps or if you have already tried this but back when I had my pearl I would always have to turn the phone off and then back on after resetting to get the backlight to work. Good luck!
after failing to get any answer, i removed the battery from my 8830 and after putting it back, everything is back fine. the trackball lights and the keyboard backlight also works. try this