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Buzzing noise from back of TV - Proscan Televison & Video

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Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Posted on May 11, 2014

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Posted on Jan 02, 2017

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NS-LDVD32Q-10A buzzing noise


Try another input and another source such as a DVD player. If you still get the buzzing sound, you could have a faulty power supply output or a fault in the audio circuit of the main board.

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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.


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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

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1 Answer

TV started making a buzzing noise at start up which gradually got worse ovre time until it would not shut off unless unplugged.


This tv unit have a colors wheel design into it.This tv problems,having loud squeling,buzzing noises or colors pictures are flashes black&white with the pictures.The tv colors wheel it is worn out and it is dying.The tv have a loud buzzing noises because the tv colors wheel it is worn out and warping out of it axis and it is spinning and hitting it steal frame box.The tv colors wheel sit way back of the tv behind many mechanical parts.Have no experience in mechanical works like take things aparts and putting it back again.Hire a tv tech. to change the colors wheel.

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1 Answer

Buzzing/fizzing noise from back of sony flat screen tv


Below is an image of rear side of your TV, Sony KDL-40W5500
Top right corner is marked there and possible cause of noise seems back light inverter board, there are high voltage going to CCFL inside LCD panel and seems high voltage leakage causing that buzzing/ fuzzing noise.

Replace back light inverter board upon voltage leakage confirmation.
Thanks.

bd073ee.jpg

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1 Answer

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Hai,
Buzzing can be caused by a bad ballast, colorwheel, or cooling fan... Nothing else makes a noise, unless it's comming from you speaker.

Hope it Helped U!

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1 Answer

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I blew condensed air through the ventilation holes in the back of the TV, which greatly reduced the buzzing noise.

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1 Answer

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Humming sounds come from the power supply and buzzing sounds come from other circuitry. Most likely a capacitor somewhere.

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