SOURCE: TV shuts down
Remove the lamp assembly, There will be a screen on the top and bottom of the assy remove all dust from these screens. also check the tube at the top of of the lamp receptical this is an air cooling pathway. reassemble and fire it up. This worked for me and saved some serious coin judging from some of the other solutions I have seen (lamp and balast) ouch!!!
SOURCE: LG 50 IN. PLASMA TV MODEL # 50PC1DR . POWER
Power supply board is dead,replaced the power supply board will get power.
SOURCE: Vizio m550nv led lcd tv. Problem began a couple
I had same problem. Unplug set for 10minutes then plug it in and let it go thru it's startup routine.
SOURCE: My LED LG TV 42" turns on/off by itself. Channels do not change.
Sorry to tell ya but your power supply panel or chip is going out! Mine done the same stuff! Freakin flat screens dont last as long as the older t.v's
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