Toshiba 65HX81 65" Rear Projection Television Logo

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Posted on Aug 16, 2008
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Toshiba 65HX81 No Power Issue

TV worked great then all of a sudden no video or audio(black screen). Press Power button and light turns red and you here a click in the rear of the tv and then nothing. I am not getting any blinking like others have commented on and I have checked all of the fuses that I can find. I am still searching for schematics. I have looked over the boards and don't see anything fried at all. Any help or suggestions would be very much appreciated.

  • jordanjcm Aug 31, 2008

    I am trying to find the fuses in my 65hx81 toshiba. fuses f889 f890 and f891 but I dont know how to find, check or replace. Please help me. PLEASE. I was told because my left side speaker has blown ( the speaker itself does work, I took it out to make sure, but the tv will not power it.) and I was told I need to check these fuses.

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Jalal Sordo

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  • Posted on Aug 16, 2008
Jalal Sordo
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Dear Jimmy, I have a 50PA4500-UM from LG. It has sound but black screen.

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
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I have a 32 inch Samsung TV that is only two years old. When you press the power button, it sounds like it it turning on and the red light comes on but the screen is black and there is no sound.

Main board is bad since it works with both video and audio. Ur backlights are ok so that omits the inverter board. And the T con board is for video only - since you have hassles with audio and video that leaves the main board. Do not think it is the power supply since your inverter board is powering up the back lights.
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Red power light blinking is shutdown--protective mode.

Before buying a remote I would see what is wrong with set.

The most common reason on this model is a short in the convergence circuit--uses two chips----method to see if they are shorted is to locate (not real easy on this model) and unsolder all 18 pins on each chip--if set turns on then(will look bad) one of the chips is gone and both need replacement.

The other issue this set has is bad Hyper boards that cause noise when cold and operate after warmup---more expensive to fix than a convergence problem.



3_30_2012_2_06_25_pm.jpg

convergence chips used in this set look like these
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Yep, your problem is a relatively easy one to repair if you know how to solder. You better repair it before it blows the fuse though. There are two capacitors in the main power supply that are coming loose and need to be re soldered. There is a Toshiba service bulletin about it. They are marked C809 and C810 on the main power supply board. Good Luck
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