Question about LG 42LG50 42 in. LCD HDTV

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I have sound but no picture can you assist

When it was turned off this morning it worked. When turned on this evening the blue screen shows then goes blank as if not on but I have sound

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  • Contributor
  • 47 Answers

Power supply trouble check caps and inverter board.

Posted on May 26, 2014

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: nothig bu a blue screen shows when turned on

Blue screen of Death?
No, this is not windoze.

can you change channels?
a blue screen usually means that you don't have a signal.
Is it hooked up through dvd/vcr player?

Try a straight connection to cable or antenna.

If it remains, then it requires surgery.

Posted on Oct 07, 2008

  • 21 Answers

SOURCE: lg lcd tv screen goes

I had this problem on my 42" Philips. Just got it yesterday and worked fine on the tv stand. As soon as I mounted the TV to the wall via wall mount system, I had the exact same issue you did. Figured it out today.

The wall mount was putting pressure against the center of the back of the tv (tv set had a slightly rounded back plate, and the mount was a flat plate). As soon as I put spacers (part of the wall mount hardware set) between the wall mount braket and the tv so there was no contact except at the mounting holes, the tv worked fine.

My theory is the pressure pushed the tv back plate against some board components which caused them to overheat (no air flow); or put pressure on internal connectors. I dont know.

Hope this helps, may not apply to your situation.

Posted on Sep 18, 2009

Clagnut
  • 1 Answer

SOURCE: When i turn on the

I have exactly the same problem with the same model tv. I am currently scouring the internet to try and find a solution to fix this problem. If you find one before I do, please share your findings and I will do the same. It has been suggested that it could be capacitor failures in the power supply unit. I have not looked at the psu yet to see if any capacitors are "bulging" I want to be sure before I start changing components.

Posted on Dec 13, 2010

  • 122 Answers

SOURCE: When I turn on the tv the screen stays blank and

Hmmmm.... most likely cause is a power supply failure.
They do occur suddenly, since electronic components are at most stress upon switch-on.

Posted on Jun 08, 2011

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