LG TV power light flashes red but then doesn't turn on [Solved/Closed]

Ask a question matt - Last answered on Oct 14, 2016 at 04:13 PM by locustthorn
Hi have a 42" LG TV model numbe 42LG7000
When I go to turn it on the power light flashes red but then doesn't turn on. Took the back off and got rid of all the dust in there. Looked at it from the back whilst trying to turn it on and the back lift comes on for 2 seconds then dimms. I've tried unplugging it for half hour still doesn't help. Please someone help me its driving me mad!

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I know this is an old, unanswered thread, but any chance you figured this out? Having the exact same issue and also going mad...!
buttbreath- Apr 29, 2016 at 11:59 AM
this is a known problem. You need a new PowerBoard(PSU). The capacitators have blown on the power supply.
locustthorn- Oct 14, 2016 at 04:13 PM
Yes we had two of these monitors and I ordered a power board that came from overseas and installed it and fixed the problem. if you want you can replace them capacitors and the way to tell if they are bad they bow up on top. Now we have the second one that just went bad so after trying suggestions on line if that does not work I will send for a new power board.
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How much did the repair cost you?
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As this is an older thread I dont mind having a shot - it seems people more knowledgable about this are not in this week.

My guess is - and its only a guess - is that it cannot see an input. Is it connected to a computer, DVD or anything like that? Perhaps the input settings are wrong - or it might be out of tune. Do you get a display when you press the [Menu] button on the remote?

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