Question about LG 42PC3D 42 in. Plasma Television

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Problem with LGv 42PC3D - won't turn on

I purchased this TV in February of 2007 and had no problems with it until last week. When I try to turn it on it clicks like it is going to come on and then clicks off. The indicator light just goes from red to green and back over again. The TV is still under warranty but unfortunately no one can come out to look at it for another 2 weeks. Was just curious is anyone had a similair problem with this model or any idea what the problem could be. Thanks

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  • angelabogges Sep 09, 2008

    I am experiencing the exact same problem. The TV was working just fine, then I heard an audible POP, now when I try to turn it on, the green light comes on, then goes back to red. HELP!!!

  • MNR916 Sep 18, 2008

    So they came out today to look at my TV and said that the plasma screen has malfunctioned. When I asked what caused it they said "electrical failure" and that there was nothing I could have done to prevent it. It was not cost effective to repair so since the TV is under warranty I am getting a replacement.

  • sheyi Sep 22, 2008

    I have a problem with my 42" LG plasma TV. When I try to turn it on it clicks like it is going to come on, then clicks off and continues to click on & off endlessly until I take the plug out of the socket. The indicator light just goes from red to green and back over again. I believe the TV is over 1 yr old and no longer under warranty. Has anyone had a similair problem with this model or any idea on how to fix this? Thanks

  • reidy678 Sep 23, 2008

    I have exactly the same tv with the same problem. clicks on and off repeatedly when turned on, sounds like a relay that won't stay pulled in.

    any ideas ? Thanks Dean

  • Paul Studer
    Paul Studer Oct 24, 2008

    We have the same problem too! When we go to switch on it clicks and we get a glimpse of colour on the screen and it goes off and then tries to come back on again. After 4 or 5 goes it "catches and away we go. ALSO sometimes if we change channels or go to T/Text it just switches off and wont come back on till it has "cooled" down. It is still under warranty and the tech should be here next week. I will let you know the result. Love the TV just this problem is scary. Tocanepauli.

  • Anonymous Nov 22, 2008

    Same problem - the TV is only 3 months old!!

  • Anonymous Dec 17, 2008

    yep same here looks like allot of people are having the same problem.
    Lg should step up and fix this!! Im just over a year so no warrenty.

  • t5lady Apr 22, 2009

    TV works great, however, the only way it can be turned off is by removing the plug from the electrical outlet.


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The POWER SUPPLY UNIT with Out !!!!
Go to 
for the Part Types, the cost is about $160.00.

Posted on Feb 10, 2009

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Option 1
If you or your husband have some electronic experience, 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, test points, and part# lists. Usually, cost under $20. And most cases the new part cost less than $15.

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