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

matt - Jun 7, 2015 at 10:08 AM - Latest reply:  locustthorn
- Oct 14, 2016 at 04:13 PM
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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5 replies

Thank you
I know this is an old, unanswered thread, but any chance you figured this out? Having the exact same issue and also going mad...!
this is a known problem. You need a new PowerBoard(PSU). The capacitators have blown on the power supply.
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.
Thank you
How much did the repair cost you?
BrianGreen 973 Posts Saturday January 17, 2015Registration dateContributorStatus August 6, 2018 Last seen - Jun 13, 2015 at 09:48 AM
Thank you
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?