Lg50pg3000 tv faults

SOURCE: Lg tv will not turn on, red light

i think your bulb is shot must be replaced

SOURCE: Lg 42pc1da plasma tv wont turn on

will be a fault with either power or y-sus x-sus board is the tv still under warrenty if so request repair

SOURCE: 42 LG plasma no picture but sound. found internal

Sounds like it started "Protection Mode" because of a failed electronic part inside the TV. When this happens, the TV will keep turning itself OFF or will not turn ON at all. This keeps the other parts inside from being damaged. Most likely the TV has a power supply related problem. The common part to go bad for flat panel screens circuit board that powers the screen itself. Most manufactures call it a Backlight Inverter Board.
But, I can't say what is 100% the problem because I can't actually look at the tv over the internet. I can only make guesses with the symptom.

You have a few choices:
1. Best thing to do, if you can find and purchase a Service Manual over the internet; It will help you diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, schematics, test points, and part# lists.Usually, cost under $20. Its the best repair guide material for fixing TVs. And most cases the new part cost less than $15 by searching on the internet with the part number.
2. Pay a TV shop to do the repairs. It maybe costly, but get an estimate of how much they will charge. That way you can decide if it worth repairing or replacing the whole TV.

I hope I shed some light on the subject for you.

SOURCE: No Sound, No Picture on LG 42LC7D

I do not have a solution but I have the same situation with my tv

SOURCE: lg 50pq3000-za plasma tv will not switch on from

power problem possible fried power capacitors
possible cause power surge could occur if unplug while tv on
must change 6 power capacitors
these original capacitors are on the low end minimal ratings
1-2 hours in house labor, cost est $200 plus minus