Was working fine until recently, the back light seems to be shutting
off. After turning on the tv, the screen will light up for about 1-2
seconds then it will shut off and become black, but the tv remains on
and working otherwise. Shining a flashlight on the screen indicates
the picture is there. Audio is OK.
Anyone know if this is a systemic problem with this TV? If so, is
there a well-known fix?

Any other thoughts about what could be the root problem?
So for this model, where is a good place to get replacement parts?
(e.g. inverter board, lamps)

Thanks
-John