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Zenith tv hissing sound coming from the back of tv

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Normally that is dust build up around the high voltage wires and component on the board.
sometimes its around the tube neck area
you will have to open the set and blow it out with an air compressor.
remember it will store a charge for days.

Posted on Feb 17, 2008

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Burnt smell


Check the main power supply regulator section for faulty component/s. The sound you heard might be of a bursted electrolytic capacitor at the power regulation stage circuit, due to some spikes in the input AC voltage. Open the TV and check this section. Be sure to unplug the TV from AC mains wall socket, before open it.

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Many do not have the audio output feature---like sets made as little as ten years ago.

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There is a hissing noise in back of tv and picture goes on and off zenith d36d51


Hissing noise and picture on and off means faulty flyback transformer, it has a small crack and voltage is leaking out, replace the flyback, if tv still not working replace horizontal output transistor (broken flyback could blow the transistor).

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High pitch sound coming from back of TV?


it could be either the coils on the yoke of the tube or the flyback. flyback would need to be replaced it that is the problem

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Hissing sound from a Panasonic old TV...Sound and picture are OK. The hissing sound even continues when the MUTE on the Box is ON. The hissing only stops when the MUTE on the TV is ON. I am using the...


If you disconnect or power off the converter box does the hiss go away?
If you connect a VCR or DVD player does it still have the hiss? We
need to isolate what source is causing the hiss if it is from the set or
if it is from the converter box.
When you turn the volume control down on the set, does the hiss
reduce in level? If mute stops it, it should reduce in level as you
turn the volume down. Then turn up the sound level control on
the converter box whether its a manual control or by remote. If you
can get a combination that minimizes the hiss and gets higher sound
level from the programming that may cure it.
I am not familiar with the converter box you are using. Are you using
Audio/Video cables from it to the set or is it coming out with coaxial cable
and used on a channel? If you are using a very old set with a tuner input
perhaps the fine tuning is out of adjustment.

Feb 21, 2009 | Panasonic CT-20D11 20" TV

1 Answer

Picture is gone! :*(


the picture tube (what makes the TV picture work) has blown out. Just call you nearest tv reapair shop and purchase a new one. (these are kind of expensive!)

(Also, if it's fifteen years old, i think it's time to get a new T.V. hint. hint.)

Jul 03, 2008 | Zenith C27A24T 27" TV

1 Answer

Sylvania wont come on


pls check the power supply ckt. the sound might come from the transformer of the power supply ckt. switching regulator maybe is not pulsating.

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Buzzing sound


You haven't specified where the buzzing sound is coming from, if it is coming from speakers, changing capacitors in the audio section will fix the problem, especially the filters. Now if it sounds like a hissing sound from back of the tv, the CRT base socket is the culprit. It is an easy thing to fix, and the base is cheap, but make sure you purchase the exact same type of base or it will harm the CRT. Good luck.

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1 Answer

Zenith A25A23W tv - Powers up - Black screen, no sound


You might have a bad power supply inside you TV or even a couple of dry joints. Patrick

Aug 26, 2007 | Zenith A25A23W 25" TV

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