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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I have a Mitsubishi wd-60735 TV. it is in an unheated garage. Will the cold winter temperatures damage anything? Do I need to bring it inside?


it used to be an issue from when older projection TV's were fluid cooled , but modern lcd projection tv (like this one) don't have any issues in cold weather other than it will take several minutes till picture comes into focus in extreme cold weather , but should not give any long lasting effects once its up at operating temps one thing though don't move it once its hot during cold weather or lamp light source will go out , one thing that will cause long term problems is if its subjected to high humidity (water) this causes all sort of corrosion problems in sets of all types

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your TV is in shutdown mode due to a short. most likely the convergence chips.
Part # STK-392-150 there are two of them...they are difficult to get to, but inexpensive, about $15 each.
if you are technically inclined you can do it yourself, other wise call a servicer, which will cost you in the $350 range.

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1 Answer

My toshiba 55H70 was working fine, then all of a sudden went out..no picture..red power light comes on and then after a minute starts blinking...can get no picture however


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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1 Answer

Toshiba projection TV. Bulbs wont come on


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.
Delhielectronics@live.com

Sep 29, 2009 | Toshiba 55H70 55" Rear Projection...

1 Answer

I have a Toshiba Projection Television (Model 55H70) that sometimes powers itself off. Sometimes it will come back on if I hold the power button down for several minutes and sometimes I have to cut power...


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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1 Answer

Sony projection tv Model kp-61h510


sounds like loose connections on the convergance amps ic's
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

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1 Answer

Projection TV convergence problem


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
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Aug 22, 2007 | Toshiba 55H70 55" Rear Projection...

1 Answer

Screen zipped down to dot of light in center and went blank. No audio either


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

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