Question about Toshiba 57H81 57" Rear Projection Television

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Toshiba 57H81 57" TV Power

I have a Toshiba 57H81 57" TV . The red power supply light which is normally on when the tv is off is flashing and the TV won't power on. I tried unplugging and replugging and different wall sockets and that hasn't helped. It still won't turn on. Any ideas of what could be the problem and how to fix it?

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  • bcclbegley Dec 22, 2008

    We woke up this morning to the same exact problem. I'm not sure that ours is the same model, but it looks similar and it's the EXACT same problem.

  • bsyds73 Dec 28, 2008

    I have the same problem, but mine will sometimes turn back on after being unpluged.

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I have a toshiba 55hx70 same problem,repair guy just left said it was the power supply and wasnt worth fixing 350 to 400 dollars The tv is 9 years old and they wouldnt even take it to shop. Its been a great tv firs thing to go wrong.. Wo nder if I could replace it myself???

Posted on Dec 29, 2008

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Posted on Jan 02, 2017

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1 Answer

Red light flashes on tv but wont turn on


Please take this steps on how to determine the problem:
1. Open the back cover.
2. Check the power supply output...It should have 5vdc for the main board..12vdc or 16vdc for the audio and 24vdc for the back-light inverter..
3. If those 3 voltage supplies have encountered voltage drop...The problem could be on power supply board..
4. If the power supply output is normal..The problem could be on the main board...
5. If the problem is power supply you should check if the capacitors are bulged on the top and try to replaced it..If you can't do that you can purchased new power supply board..
6. If the problem is on main board there is no D.I.Y repair on that so you need to buy a new main board that fits to your TV..
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It sounds like your switching power supply or you High Voltage power supply has malfunctioned. These sections control all power to the TV and can produce the situation you are describing. If you do not have a background in electronics, I would suggest that you have a TV repairperson come over and check your TV out.

 

I say this because there are voltages in a TV set that can kill, so caution is needed.

 

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