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Make a hard reset to this set. To make this, unplug the TV from the AC wall socket, wait for some time, say 5 minutes or so, and re-plug it back. If the problem is with its software reset, this must solve the problem. Otherwise, contact the nearest authorized service centre for LG. A firmware update might be necessary.
the inverter for the backlight likely has a bad capacitor or more. The fluctuating high voltage is causing the jumping and eventual blackness until sufficient charge is on the caps, at which point it stabilizes...it eventually will stay black unless the caps are replaced.
Press and Hold <OK> button on remote as well as TV panel at the same time for a few minutes.
To save the changes press <OK> in Remote. PS: Be very careful while playing with the service menu. If something goes wrong, just switch off the TV and switch on it again.
hello my friend you have some loose connections on the digital board.this board is located right in the top center of the tv.if you do not have repair skills call the repairman he should not charge you too much for this job.
I have the same problem, I just spoke with LG Customer service. They had me unplug the power cord, hold down the power button for thirty seconds, plug back in and turn it on, this DID NOT work for me, but maybe it will work for you.
Good Luck! Mine is going to a service shop, maybe what they tell me I can post and it will help you if you have not gotten your tv fixed yet!