Toshiba 61H70 61" Rear Projection Television Logo

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Posted on Sep 26, 2007
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Jittering screen Our rear projection Toshiba's picture has started to jitter and shake. We're also getting double picture on the right part of the screen. We'd appreciate your help. Thanks.

  • dawidshalom Mar 24, 2008

    my zenith tv screen is jittering horizontally,when i turn it on; the top part of the screen and the bottom part is both blue,and the middle part is the only part showing jittery.after a few minutes i will get the full screen,but it jitters back and forth.

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Vista Electronics

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  • Master 1,694 Answers
  • Posted on Sep 26, 2007
Vista Electronics
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Joined: Sep 24, 2007
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Chassis will need to be pulled by a skilled technician.Some specific area hand-soldering is needed and the STK convergence IC's need changing w/OEM or better quality parts.You have a good set worthy of repair.

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The cables might be loose or the electrical might be at fault or the power supply is having problems for your TV or the bulbs are starting to no longer work anymore the firmware or the software needs to be updated.
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How old is the screen? if more than 5 years, the circuitry can go bad. I had this with one of mine, it would jitter for about 10 mins before it warmed up. Just get a new one, they are cheap as chips
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Depending on your Toshiba model this may be an issue with the hypermodule. When it fails it will make the TV zig zag looking. One quick test is to see if your picture-in-picture window looks normal. If so the hypermodule is the issue. You can google Z1234TV to locate parts.
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This is essentially a convergence problem and will continue to get worse. If you can solder, try resoldering the pins on the convergence ICs. If that fails to resolve the problem, replace the ICs. These are large black ICs attached to a heatsink and should be marked STKxxx.

Keep us posted on your progress.

Dan
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I will never buy another Westinghouse product again as long as I live.
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