Question about Toshiba 55HX70 55" Rear Projection Television

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Little to no sound

All i can hear is a low pitch rumble when i turn the volume real high. I can not make any sense of what i am listening to from the the noise that i hear.

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Re: little to no sound

There is a very tiny switch on the back of the set near the external speaker terminals. This switch has likely gotton put in the wrong postion.

Posted on Aug 02, 2007

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What may cause a high pitch hum.even when muted or volume turned down?

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Its so high pitched that some people can barely hear it, but I guess I have sensitive hearing. ... Anyway, this seems to be a fairly common issue and it is caused by either the ... You're probably hearing a transformer humming.

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The real clue would be if you hear the sound with the audio or volume OFF.

It is either a problem in the audio circuit or you are hearing a sound being made elsewhere in the set -----a buzz or such or even a high pitched whine.

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If the sound is heard with volume all the way down/off and you hear a buzz or high pitched sound the issue is on the power board--something is vibrating hard enough to produce the sound----usually a transformer of some type---

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That could be either the color wheel or one of the fans. try listening to which area of the set its coming from.

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1 Answer

I have a Samsung HL-R5677W TV set and now there is no picture at all. Every time you power on the TV the green light flashes and you hear this sound that repeats itself. It sounds like a camera flash, low...

I have a few questions which will determine what your problem may be.

Did or does the set make a high pitched fan like sound or a high pitched whine?

What have you examined so far?

As far as a lamp it is unlikely it will cause such a sound but if you remove it look to see it is intact and not shattered.

Let me know


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1 Answer

When turning on samsung hln467w, lamp light blinks, screen stays dark, can hear audio from tv show, but then a high pitched sound begins for a few seconds. The tv turns on and off for a few cycles with the...

The tv have a colors wheel,have a whinning high pitch sound,mean colors wheel is warping not spinning right any more.The colors wheel is dead,must be replaced.The tv have high pitch sound,shutdown the projection lamp.The projection lamp might be dead or not?Not yet determine dead or just shutdown by the nonfunction of the colors wheel.

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I have a volume problem. When I adjust the volume at a listening level, a high pitch sound can be heard then the volume turns low and goes back to the set level. It happens in every channel (Direct TV)....

No ,replacing speakers will not fix the problem these sets are very well know for Poor Solder and connection ,resolder signal,Audio,& power supply boards this should correct the problem and alot of future ones too.

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I have a Sony Grand Wega 61" that is only 2 years old and the screen goes black for a couple of minutes and comes back on. It's not losing sound, just the picture. It was only happening about once an hour...

It could be but it may be cycling due to heat; if you turn the sound completely down and listen at the rear of the set, you should hear the murmur of a fan. I would listen when video is there and when it isn't to sense if there is any difference in low-level noise coming from within.  
If you don't hear a fan, it may be either burdened with a dust buildup or failed. Any set that uses high-temperature light sources will be protected against fire or internal damage by a thermostat of some nature that will trip and reset by itself. 

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Hi, There are usually 1 or 2 fans inside the TV's. Could be worn bearings, or fan blade interference. Sorry, without my electric ear working, I can only guess.

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High=pitched hum

Hello, Using appropriate safety precautions, you can try prodding the various suspect parts (flyback, deflection yoke, other transformers), even lowly ferrite beads, with an insulated tool such as a dry wooden stick. Listen through a cardboard tube to try to localizing the source. If the sounds changes, you know what part to go after. Once you have located the guilty party, some careful repositioning, a strategically wedged wooden toothpick, or a dab of RTV silicone or hot-melt glue may keep it quiet. Best regards, Arpi

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