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Sound Issue There is a high pitched noise coming from my television. It only occurs when the TV is on and goes away when it is on mute. It is less noticeable if headphones are plugged in, but it is still there. The noise volume is consistent, in other words it does not change regardless of the TV volume level.

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  • Televison & ... Master
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This might be of the core vibration of the backlight inverter transformers.

Posted on Dec 09, 2012

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6ya6ya
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Posted on Jan 02, 2017

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freetek
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SOURCE: High pitched hum from LNT5265FX when powered off

What may be doing this a a type of transformer used in switching power supplies with a ferrite core. It is rare but, if the transformer and its windings are not well secured with lacquer or epoxy, the core or windings can vibrate at a frequency related to its operating frequency which is normally beyond the range of human hearing; typically, 50,000 cycles or higher. This lower frequency is called a subharmonic. When the set is running, the electrical loading of this transformer may be causing the singing to cease because of the changes in the strength of the magnetic field (higher current) until turned off again.

Posted on Dec 18, 2009

budmrtn
  • 11361 Answers

SOURCE: loud buzzing noise on vizio tv

It sound like you may have sound processor problem which is part of the main board, I would also look at the 12vdc from power supply to make sure it is clean DC.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=l37hdtv10a

http://en.wikipedia.org/wiki/Capacitor_plague

Posted on Dec 22, 2009

moorah1
  • 181 Answers

SOURCE: High Pitch Sound when TV is turned on.

problem with capacitors in a power supply. if you 're a pro, poke she set open, by taking away 3 screws at the bottomof plastic grill, right above in/out plugs. slide grill down, make sure take screws completely out. another big screw in a miggle of grill must go out. after you manage to get plastic out, you'll get metal shieild off, by taking another 3 scews at the bottom. pry it open and lift it up, then slide it out of the assembly(looks like a rectangular box. then, expose the electronics: power supply is at the top of the module, trace power cord to that. disconnect power from the unit and look for bloated elecrolytic capacitors.found the ones, replace with exact value.
good luck.

Posted on Apr 05, 2010

  • 208 Answers

SOURCE: when turning on TV sound volume is too high

HI check the menu setings under the sound menu. there may be a power on volume setting in there

Posted on Aug 13, 2010

joeymille916
  • 143 Answers

SOURCE: Philips widescreen flat TV model #50PF9966-37 50"

From what I'm seeing online, the bulbs in the Ambilight may be the culprit. I also read that a firmware upgrade could fix the issue too. There was also a recall of some TV's with that issue, so I would check with Philips about your model and serial number and see if your TV was included in the recall. If you raise enough cain and threaten to never buy from them again, they may get your set fixed for you... even if the warranty is up!

Good luck and please post feedback!

Posted on Oct 10, 2010

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Funai tv. When plugged in, makes ear piercing high pitched buzz that goes away when unplugged. Will not respond to buttons. No picture or power. Already replaced power board. What now??


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


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This is the Famous 3 strikes and out for RCA's--it tries to come on 3 times and if fails shutdown occurs.

The high pitched sound may be a short or could be something arcing--if the sound comes from near the very front of set--could be the HV splitter this set has arcing.

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Philips widescreen flat TV model #50PF9966-37 50" plasma, as the tv warms up a loud hissing sounds comes from the back. The hissing sound does not go away when you mute the broadcast sound. when you change...


From what I'm seeing online, the bulbs in the Ambilight may be the culprit. I also read that a firmware upgrade could fix the issue too. There was also a recall of some TV's with that issue, so I would check with Philips about your model and serial number and see if your TV was included in the recall. If you raise enough cain and threaten to never buy from them again, they may get your set fixed for you... even if the warranty is up!

Good luck and please post feedback!

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Loud buzzing noise on vizio tv


It sound like you may have sound processor problem which is part of the main board, I would also look at the 12vdc from power supply to make sure it is clean DC.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=l37hdtv10a

http://en.wikipedia.org/wiki/Capacitor_plague

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You have a problem is in your horizontal section which also is part of your power supply. The high pitched whine is from the Intergrated High voltage transformer (also called the flyback transformer). This sound occurs when the freuency of the transformer changes and or the voltage gets too high. The click occurs as a result of the drawing of excessive current by the HOT Horizontal output transistor. This is repairable, but requires the correct equipment and a schematic.

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