Question about Toshiba 57H81 57" Rear Projection Television

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Yellow and blue streks on left and right side of screen

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Hello davema....replace the STK chips and make sure resistors are ok, If the board is different i wouldn't use it.
(Please click on high lighted words)
Hello, friend you have a convergence issue, first see if they will move manually in your menu, they should be able to move up down left and right, and if not this is when two chips labeled STK392-xxx Failed. They can be located by finding the largest heat sinks in the unit.
Along with the possibility being an open resistor and or open fuse in the convergence circuit. All of the resistors around these chips should be checked pay attention to the ones that are standing up and they all should read low ohms, If they are in the k ohms they are probably open which is bad ,This is a tricky repair, if you have Never done this repair I don't suggest it.
But if you are willing to tackle this problem the only step by step procedure I found for you would be to watch someone do the repair, and this I found on the internet in the convergence problem screen. This will give you an idea of the work involved and also what the parts look like. For sites were you can pull up manuals, check here
www.free-service-manuals.com
www.s100-manuals.com
www.eserviceinfo.com

Posted on Jan 03, 2011

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