Question about LG 42PG20 42 in. Plasma HDTV

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42PG20D - after running for 10 minutes loses picture quality, picture still barely visible

My LG 42PG20D, when first turned on picture and sound quality are excellent. After unit warms ( about 10 Min.) the picture quality is lost. picture is still visible on screen but very poor quality, like paint mixed into water, it appears that a component when warmed up is failing. if set is turned off and allowed to completely cool off, it starts with perfect picture again until it warms up then same problem . what item would you suggest is failing?

Posted by Anonymous on

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Posted on Jan 02, 2017

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hi it sounds like when tunned in tv it was tunned in shop mode.
do a factory reset and choose home when installing

Posted on Mar 01, 2009

  • 1239 Answers

SOURCE: My 42 inch plasma has black distorted picture

its cathode ray tube problem or the colour wheel...check that both please.....
thank u,,,,,,

Posted on Mar 07, 2009

  • 335 Answers

SOURCE: Invalid format

Try rechecking all wire connections for proper placement and fit too and from the tv.
Try adjusting the video format on the DVD, flip through 480p and 1080i. See which format works best with your tv. Do the same with Wii.

See if this helps.

Posted on Jun 13, 2009

  • 1 Answer

SOURCE: After warming up (about 30 min.)my LG LCD TV

i have the exact same problem with my tv but the thing is that mine would would work for the first 4 seconds then it would black out

Posted on Oct 09, 2009

  • 70 Answers

SOURCE: LG32lc7d unit. When it is cool and you turn unit

It sounds to me like there's a few bad capacitors on the main power supply board,take the back off and look around for any electrolytic capacitors that have puffed out tops.

If this helps please give a positive feedback

Posted on Nov 01, 2009

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