SOURCE: My 42"LG 50 TV will not turn on
One important step to see if you are having an internal problem is to perform a power drain.
1. Unplug the product's power cable so that the device is not grounded to the house. Do not simply turn off the power-bar if one is in use.
2. Press and hold in the products power button for 1 minute to release the retained electricity from the capacitors and circuit board.
3. Plug the product back into the wall outlet rather than a power-bar to rule it out of contributing to the problem and turn the device back on.
If this does not work but you are still seeing a LED lit up, there is probably a problem between the TV's power supply and the mainboard and service maybe required.
SOURCE: LG 42 plasma power problem
needs power supply Part number 6709900023A
it is a 171 dollar part, you should be able to order through LG,
SOURCE: LG 50px4dr plasma tv turns off immediately after
The problem could come from the power supply at the first suspected one. If you have a knowledge of trouble shooting, open the cover then examine if any caps there look poping up. Use your finger touch on the top of caps you will feel it. If not, check all the fuses there then disconnect all the cables from power sup to other boards, except the main board. Check Va and Vs according to the label attached on the back of panel. If the power sup shut down, replace it with a new one. Hope it helps.
SOURCE: lg 26lg30 light blinks red blue wont turn on.
you have a bad cap in the power supply
these are can shaped device thet if bad will vent anf put up on the top the valoue is wrtten on the side trplace them and you should be good to go
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