Question about Toshiba 55H70 55" Rear Projection Television

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Model 55H70 Toshia

TV was moved from one house to another in temperature of 40. Light comes on but no picture is this because TV is too cold. Do we just let it warm up?

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Remember the old VCRs, which would tear up your tape if you took it into any kind of environment that could create dew inside?

This could be happening here too. Let it warm up for a day and try again.

Mr Bob

Posted on Feb 03, 2008

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It is probably your horitzontaltransistor that is shorted and it will have to be replace and it is located need the fly back transformer, on a metal heat sink, and to have it repair you are looking at around 400.

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I have a Toshiba 55H70 TV. Lately it has been having issues with the screen. The picture will go out and theres different color lines, if we turn it off or unplug it and plug it back in it comes back. we...

Sounds like possibly cold solder connections on the convergence IC's I believe there are 3 in your tv. They are easy to spot big black IC's that have STK392-xxx stamped on them.. If your lucky you can solder the connections and be back in business. Sometimes because of the bad connections left unrepaired it will cause the ic's to fail then they would need replacing. If you have soldering skills you might try yourself. Be careful and make sure its unplugged. If you arent skilled at soldering I wouldnt recommend even trying it.

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The deflection board in failing, eventually it will not come on at all, disconnecting power is only reseting the HV shutdown protection circuit which is the reason your set if failing. Have a technician replace the Horizonal Output Transistor and the flyback transformer.

Please comment if you need futher assitance.

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if your tv was made in 2008 that could be the problem because some of theToshiba that model had a defect if you contact the head couters 18004577777 they will most likely will send over a worker to fix your problem. thank you

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Get it fixed, because this is a simple repair. One of your convergence IC's has burned out and needs to be replaced. A good tech can fix the set in-house in about an hour and a half, and I charge $150 when I fix a set like that but shops in your area will vary so ask around. If you have a satellite receiver or a cable box, the changeover in 2009 should not affect you.

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1 Answer

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sounds like loose connections on the convergance amps ic's

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1 Answer

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the deflection circuit shut down and i hope it didn't burn the crt's .

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