Question about SNK Magnavox 42MF438B/27 42 in. LCD TV

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My t.v makes a high pitched sound when on any of the hd settings. comes on while viewing suddenly and is very loud but not on the regular t.v setting which defeats the purpose of having a hd t.v..

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Seven ways to pinpoint that high-pitched, whining noise

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Oct 2, 2013 - I recently had new fan belts installed after hearing a high-pitched, ... Do you hear the noise when the engine is running and the vehicle ... Just replaced water pump (and timing belt) yesterday and squeal ... When driving it make a noise but change out and caught speed the noise is coming from driver side.Missing: 1999 ‎plymouth ‎breeze

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You hear a high-pitched squeal that stops when you shut off your engine: Readjust or replace the belt. These belts should have about half an inch of play and ...Missing: 1999 ‎plymouth ‎breeze

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1 Answer

Toshiba HD ready TV ct 90158 makes high pitched sound


A high pitch sound can be a capacitor losing power it would sound a bit like a fire work. most have back up on the board but it put more pressure on them the more times you use the tv. would check them and replace. all of them can be 5 in a row in some models.

Oct 23, 2013 | Toshiba Televison & Video

1 Answer

High pitched noise coming from back of Viore LC32VH56A. Not speaker related.


A refurbished set!

Its a coil or transformer that is not tightly mounted or is vibrating hard enough to make the sound, If this is a refurbished set that is why it was returned and exchanged-----

Two ways to fix---locate which board is bad and correct the problem with Hot glue on the individual part making the noise OR just replace that board.

Dec 08, 2012 | Viore LCD32VH56A 32" HD LCD Television...

1 Answer

TV making loud buzzing sound


More sets than you might imagine have this kind of problem---I a regular TV it is usually a transformer that is vibrating hard enough to make the sound---the higher pitched sound is just that--a sound.

If this is a direct view(means not a flatscreen and has a Glass Picture tube it will be either the high voltage transformer or one of several smaller transformers.

This can usually be fixed---seen a few so loud the cats in the house run away.

Let me know model number of set for more information.

On chance it has the high voltage transformer I attach a photo of what that looks like.

5_23_2012_9_22_57_pm.jpg

May 23, 2012 | Zenith Televison & Video

1 Answer

A loud buzzing is coming from the back of my sanyo ds 25390 tv. picture and regular sound is fine


If it is a high pitched whine or buzz it is likely a transformer vibrating so hard it is making the noise.

There are ways to try to deal with this issue but the set has to be opened and probed to locate where it is coming from--


for example with back off and set on a plastic rod can be used to touch areas and exert slight pressure until the sound changes or goes away--then either replace the part or I have used hot glue etc to stop it.

You first have to locate the source of the issue:

find where it is coming from.

Mar 24, 2012 | Televison & Video

1 Answer

Hd tv makes a hjgh pitched sound whats wrong


Hi, the high pitched sound is coming from the coils or transformers on the power supply.
you can isolate the noise by removing the back and with the set on press gently with a plastic handle/item on each coil till you stop the noise. , you will probably have to replace the coil or the whole power supply, but sometimes you can tilt it over or secure it with silicone and it will stop rimging.
please click a thumbs up it this helps solve your problem
Eric

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1 Answer

Suddenly making loud static noise


I have a dect 6.0 cordless phone and all of a sudden it started making this very loud, high pitched continuous whisltling sound. It only stopped when I took the batteries out. After putting them in the phone seems fine now.
Any ideas what happened?

Jun 28, 2009 | Uniden Cordless Phone

1 Answer

Loud, high pitched hum from speakers . . .


This is GroundNoise from the TV's Backlight.

Sorry, but unless you are a Technician, you will simply need to ignore it.

If you are a technician, you can fix this by grounding the Audio ICs to the Power Supply (details not provided)

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2 Answers

Weird noise over everything


According to the Samsung website: "The high pitched sound you hear is probably coming from the flyback transformer. The flyback transformer converts the relatively low voltage electricity that comes from the outlet in your home to the high voltage electricity needed to drive the cathode ray tube in your TV. It is not unusual for a flyback transformer to buzz softly when it operates. However, if the sound is loud and high pitched, it probably means the transformer is failing. To eliminate the sound, you will have to get your TV serviced."

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1 Answer

Zenith C27V22 27" TV loud humming noise


There is a coil in the set with a magnet glued to it, called the horizontal linearity coil. Sometimes the coil "sings", making a squeeling sound. I have seen this many times, and there really isnt anything actually electrically wrong with the set. To stop the squeeling the coil should be replaced.

Jun 19, 2007 | Zenith C27V22 27" TV

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