SOURCE: lg42px5d
This could be from a failed power supply, or a failure in the management area, or a short on one of the boards which is shutting down the power supply.
Jerry G.
SOURCE: power loss
I had the same problem. I replaced the power supply board and everything is good as new. Part numbers I ordered were 6871TPT303B (PSU board) and 6631T20037D (cable assembly). Total cost was about $145 and it took less than 20 minutes to fix. I believe Bestbuy Partsearch has the board and the cable, but I ordered mine through www.encompassparts.com/lgconsumer.
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