Question about LG RU-52SZ51D 52" Rear Projection HDTV-Ready Television

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Fading screen The sreen has a picture on the left side. Slowly fades away screen mostly black on the right side. But u can still see the pic on the screen. It just darker on the right side.

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If you're seeing a shadow either vertically or at an angle the most common/probable cause is the light tunnel in the light engine. I have this same problem with my ru-44sz51d and have found many people with similar problems. For reference search "dlp light tunnel" as many samsung dlp's are suffering from the same problem and have been since they were purchased. You should be able to repair this yourself, but only if you feel comfortable and are knowledgable in such a situation. The repair may consist of replacing any number of the 4 or so mirrors or just reapplying the silicone adhesive to the original mirror. As I have not done this yet myself I can only speculate and refer to topics I've read about. Good luck

http://www.pause.com/index.php/how-to-get-your-samsung-dlp-light-tunnel-issue-fixed-for-free/

Posted on Jul 18, 2009

  • Tom Fillmore
    Tom Fillmore Jul 24, 2009

    Actually, I disassembled the tv and took out the light engine, cleaned a couple mirrors and took a look at the light tunnel and didn't see anything wrong with it. There is a mirror on a mounting bracket that has 3 screws with springs attahced to the bottom of it. I reassembled the tv and I forgot to measure the distance that the bracket depressed the springs. So I guessed, and when the screen came on I had even more problems with shadows then when I began. This time I had a shodow on the top that wasn't angled and no shadow on the side. So I believe the problem lies with adjusting the mirror's spring dampening/tightening. I will find out tomorrow

  • Tom Fillmore
    Tom Fillmore Jul 24, 2009

    I succesfully realigned the mirror and I didn't need to buy anything! Of the 3 screws, there are 2 that you adjust for a horizontal length shadow (example: a shadow on the top of the screen.)

    The screw by itself should be used to adjust for a vertical shadow, either on the left or the right.

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The right half of my 2006 Samsung 56" DLP TV screen goes completely black. After we turn it off and back on the picture will be fine. This occurs randomly - sometimes it works all night - other times we need to turn it off and on several times an hour.
Might it be a light engine failure?

Posted on Aug 15, 2009

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Hi and welcome to fixya, it is the colour wheel problem,,,,,,,,,this is common problem please check it ...it may be also cathode ray tube... thank u.........

Posted on Jun 03, 2009

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