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Buzz sound WHEN THE TV IS ON IT MAKES A BUZZING SOUND.

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  • vic richards May 11, 2010

    what brand and model is this set.

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Sounds like relay chater might be a bad capastor out of spec near the relay i dont have the spec on this tv but some sanyo tv had that kind of sound and it is a bad capastor like 470u at 25 volts in them. Look for a bulg on the top of caps around relay area. Board marking are like c 601 this is not the right number for your set just to let you know sort of what you are looking for the c standing for capastor. Be sure to unplug tv before youtake it apart there is high voltage in the set even after you unplug it.the cap shuld be black or blue with a silver flat top even if they look good still can be bad cant tell untell you test them on a machine.

Posted on Mar 04, 2009

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I have a proscan 42LA45H 42 in television that has started making a buzzing noise from the back. What is causing this, and what do I need to do to fix.


Hi
If picture and sound is Ok, and only this buzzing sound is heard from the back of the TV, It should be due to core soose of some ferrite cored transformers inside, especially to the power supply regulator board of the TV. Open the back cover of the TV and swtich it ON. Listeen very carefully which transfromer makes the buzzing noise. Just trouch and press the core of the transformer suspected with some non-cunductive material like glass rod, or a stick of dry wood. You can identify the transformer that makes noise by this way. After identifying the exact transformer; switch OFF the set, unplug it from mains socket, apply some "Super Glue" like fast boanding glue to the joint of core of that transformer. Allow sometime for the glue to set. This will solve the buzzing sound problem of your TV. OK

Jul 13, 2011 | Proscan 42LA45H 42 in. LCD TV

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I have comcast and get buzzing from the box when everything is off. Do you have the option of unplugging it and having the t.v. on by itself or will the provider have to come reprogram it. If not, disconnect box to rule out t.v. before t.v. warranty is out.

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Buzzing from inside when off.


hi!if your t.v is always on stand by power mode and there is a buzzing sound the problem is in power supply section,you need to check for weak capacitors.

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This is a problem in the filter section in the power or sound source.

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my tv is new too and also makes a buzzing sound and i turned the DCR off and it worked to thanks for the help!!

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Quasar 1989 tv makes a buzzing motor sound


Hi and welcome to FixYa,

Initially, if you have confirmed that the source of the buzzing sound is from inside the TV, then that would indicate a component about to fail or would need attention. Let us try process of elimination:
  • tuner - most unlikely, the tuner is responsible for selecting the channel. No component/part of the tuner could make such a mechanical buzzing sound;
  • speaker(s) - most unlikely, the speaker could have a buzz but generally would not affect the video nor cause snow (weak TV signals);
  • transformer - a strong possibility although without knowing the exact model, at most generic ideas; power transformer, flyback transformer, horizontal drive transformer (unlikely);
  • arcing - another strong possibility. This could be caused by damp, dusty surroundings of the components especially at the FBT area. Another area that could have adverse effect when dusty/damp would be the anode cap.
This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

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Have you tried adjusting the contrast? , have a similar problem with a 42'' lcd and it appears to be related to the contrast setting .If is set my contrast below 90% the buzzing sound stops.
This buzzing sound seems to be a common problem with LG TV's

Nov 24, 2007 | LG 42PC5D Television

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