backlight comes on, but goes off after a while.
Did you ever sort this out?
I have a White MacBook with the same problem. backlight comes on, but goes off after a while. It is not a mechanical problem. Moving the lid makes no difference and wiggling the cable on the inside makes no difference. Interestingly turning the machine off and back on restores the backlight (for a while).
Originally one wire in the inverter cable was broken (it got caught in the hinge). I fixed the wire but now I have this issue. Any suggestions?