Question about Toshiba 53H71 53 in. Rear Projection Television

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Toshiba projection tv with lines on screen

I have a 52" Toshiba projection tv and the screen gets lines all across it like the screen is messed up and the the top part of the screen bows down. Have had a repair man say it is probably the convergence going bad, but he said that when that part goes bad you normally cannot unplug the tv and plug it back it and it work. On mine you can unplug it and plug it back it, sometimes it will work all day and sometimes it will do the same thing again & shut off, then the red light blinks on the tv.

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I have seen a lot of sets where the problem only happens when the set is first turned on---99% of the time one of the two STK-392-110 CONVERGENCE chips this set uses is Flakey--intermittant---The only way to know is replace both of the convergence IC's and see what you have---a bad IC can cause the set to shut down---and sooner or later the set will just shut down and not come on at all.

Let me know if you need more information about this type of repair as I have done hundreds of sets with this type of problem----every one I have ever seen where the convergence was intermittent----replacing the two IC's cured the problem.

REGARDS, SD TECH

Posted on Oct 01, 2009

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