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Buzzing noise from back of lcd tv,made by LG.

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Thats not good could be many things ill take it for a repair or a check up

Posted on Sep 09, 2008

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Posted on Jan 02, 2017

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I have a 50" LG LCD flatscreen TV. The screen is white and blurred out. I got the TV from a friend and am wondering what is wrong with the screen. There is also a buzzing noise coming from the back.


T'Con board fault. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Nov 22, 2016 | LG Televison & Video

2 Answers

Tv making loud buzzing noise


A common cause are failure of decopling capacitors in the audio section, and or the circuit board power distribution that feeds the audio board. Most of the capacitors are surface mount components. The standard fix is to start by changing the circuit boards that have the defective parts.

If the set is under warranty, call for warranty service. Out of warranty service is expensive for these TV sets.

Jerry G.

Jun 12, 2012 | LG 32LG30 32 in. LCD HDTV

1 Answer

LG LCD TV - Buzzing Sound and Faint Horizontal Lines


From your description, the sound you are hearing is the inverter(s) that drive the back light for the LCD screen/module.
The inverters mounted on the back side (one lower right and one left side) of the LCD screen/module. They are under the sheet metal cover/shields.
The inverters are going out and or the LCD screen/module is going bad too.
That LG TV has only a 1 year on parts and labor from the date of purchase, but you could call LG and ask for their help for such a new TV. They might do it under a warranty, for little or no cost to you.
I hope this information has helped you.
Good Luck.

May 23, 2010 | LG 47LG70 42 in. LCD TV

1 Answer

Buzzing noise


you have to replace a capacitor in powersupply
c208 2200uf/16v

Apr 19, 2010 | LG 42LC2D 42 in. LCD HDTV

1 Answer

LG 42LH30 Audio Problem (Background Buzzing)


Ur power supply board.Transformers have have high voltage gap.This problems must take the tv aparts put some glue arond the transformers,sometime solved this problems,or must replaced all the trnsformers make the humming noise.Brand new tv take it back,where u bought it get a replacement or call the Manufacture help to fix the problems or replaced the part that cause the problem.

Feb 08, 2010 | LG 42LH30 42 in. LCD TV

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

Oct 23, 2009 | Sony BRAVIA KDL-40V2500 40 in. LCD HDTV

1 Answer

LG 37LP1D - Buzzing niose coming from TV


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

Mar 03, 2009 | LG 32LX1D 32 in. LCD Television

1 Answer

Lgrz37lz55


I have the same problem amongst others, including rolling squares over the picture, but i cured the buzz by using scart connection 2 instead of connection 1; that is assuming you use a scart.

Mar 16, 2007 | LG RZ32LZ50 32 in. LCD Television

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