Question about Sony WEGA KE-42M1 42 in. HD-Ready Plasma Television

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Thin white horizontal lines!!! I've had my WEGA KE-42M1 for 5 years with no problems until about three months ago. After about an hour being on, there are thin white horizontal lines that move randomly across the screen. Sometimes, after a few minutes, the screen becomes dim and loses some resolution and the white lines disappear. This will alternate back and forth. Today, the screen immediately had the white lines upon power-up! HELP!!!!

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  • Bob  Adam
    Bob Adam Apr 16, 2011

    I've got the same problem but with a little more information- TV works for hours (5 or 6) then I get the white lines for two to three minutes, then it clears up but sharp angles and color changes have a blocky apearence on the screen as if it were in 8 bit. I thought it was an over heating issue because of the amount of time so I stripped it all down cleaned up the fans and otherwise checked for hot spots with a thermal scanner, no problems found. I ran it again and about 5 to 6 hours later same experience. If I turn the TV off and back on it's good for another 5 or 6 hours. Still thinking it was an overheating Y sus board I pulled the heatsink off and heated it up with a heat gun and it wouldn't fail. I checked all the boards in the same way and it's not an over heating problem. I still think it's the Y sus board because of the horizontal lines but I can't find one on ebay to test it, and I don't want to spend a hundred plus dollars on a hunch. Saying the TV is failing is not helpful this is a DIY board so I'm looking for help so I can do it myself.

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I am fairly certain I fixed my problem - I know this post is old, but maybe it will help another. The Logic main board found under the connector tray will have three ribbon cables on the bottom leading out to the lower buffers. I replaced it with a second hand one from ebay and the lines have been gone for days. It's a Samsung board, and common in several TV's, so getting your hands on one shouldn't be hard.

Posted on Sep 20, 2011

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  • Michael Lam
    Michael Lam Feb 24, 2012

    can you be more specific? or add some picture links?

  • Bob  Adam
    Bob Adam Feb 24, 2012

    Sorry I sold this TV about six months ago and don't have a way to look up the board. If you're looking for a place to start swapping boards the logic main is where I would start.

  • rene Dec 25, 2012

    hello , iam from holland ,the netherlands ihave a sony wega kep 42 m1 ,plasma tv.and did have the same (sort off )problems , idid remove the big metal housing thats under the black one thats what you first see at the back, its a temperture problem the heat can get a lott better out now and i let the tv play without the metal cap inside and without the blak one and do have no troubles yet anymore maybey i make bigger holes in the metal cap in the near future,hopefully can help this anyone ! greetings from the netherlands rene bergboer

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Sounds like your TV is giving out, plain and simple.

If this doesn't sound right, then only one thing comes to mind. Have you moved the TV recently? Are you using a different coax cable, (if using cable that is). If so, just change the cable back to the previous one and you should be fine.

Posted on Aug 21, 2010

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