Question about LG 42LH30 42 in. LCD TV

1 Answer

LG 42LH30 Audio Problem (Background Buzzing)

I have a brand new LG 42LH30 TV and I've noticed a consistent humming, or buzzing sound coming from the set. It seems to be coming from the speakers. It's largely drowned out during programming, but is quite obvious during the split second silence that precedes a commercial. I can't imagine this is normal. Any advice?

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • LG Master
  • 8,457 Answers

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.

Posted on Feb 08, 2010

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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

I have bought an optical fibre cable to connect from my jamo a305 to my new sony nx810 tv and im getting a buzzing sound, there are 2 optical fibre outputs on the back of the amp, which one do i connect it...


Have you looked at the manuals?

http://www.retrevo.com/search?q=sony+nx810

A TV won't run external speakers directly. Besides, the TV-related audio should originate at, say, the cable Box, and go straight to your (presumed) AV receiver for the best possible decoding and reproduction.


Buzzing is an analog phenomenon and is NOT carried by optical cable in any case.

Buzzing is usally AC line noise leaking into an un-shielded cable somewhere or a floating ground. If the AC plug is reversible, try that. Sometimes the buzz is from an attached device. Make sure all audio cables are plugged in tightly at each end and routed away from or at right angles to any power cords and away from other sources of strong magnetic fields like TV's. I've also seen variable track lights induce noise but it's usually minor.

Try rotating the power cord in the wall outlet.

If it still buzzes with no cables or anything external attached there's an internal problem.

Disconnect the input(s) and see if it hums in the absence of an audio source. A bad audio cable shield or unwisely-routed audio cables will allow entrance of unwanted signals from external power sources, magnetic fields, even dimmer-controlled track lights. Sometimes, simply reversing the orientation of the ac power plug can eliminate humming.

Reverse the cables Left to Right to see if it stays with the cable or the input channel. Follow it back to the source, isolating in the same manner. Eventually you will find the entrance point of the hum. Frequently a cable's ground will oxidize over time and simply removing and reattaching the cable with a twisting motion will re-establish the shield.

May 02, 2011 | Jamo A 305 Main / Stereo Speaker

1 Answer

Lg lcd tv humming sound which varies throughout a programme no rhymn or reason to it but especially noticeable when quiet part of programme


Alot of Tv's have this sound that comes from the speakers or the back of the set. Its normally when the transformers inside are underload they start buzzing. this could come from the Powersupply or the Inverter. When changing channels they change their tone sometimes.

Mar 22, 2011 | LG 32LG30 32 in. LCD HDTV

1 Answer

Hi, I Purchased an LG 50PK350 plasma tv and I am experiencing an extremely loud, annoying buzzing sound even with the amp switched off & the sound muted. The buzzing is not constant ... the brighter...


I have this tv aswell, and yes I will confirm that it does buzz quite alot, but all plasma tvs do, it is to do with how it renders images, the buzzing can be made worse by it being close to a wall and it reflecting back. I found that my tv stand some how amplified the buzzing when i got mine. I dont think its something you can escape.

Mine i notice also when scrolling around menus seems to have lines that follow your selection....not to pleased about that

Oct 18, 2010 | Televison & Video

3 Answers

Samsung P237HD tv/monitor,unit buzzing when on.


I would take it back unless you have time to investigate the problem before the return policy expires.

If the sound is coming from the speakers then it is interference and would likely happen with another TV.

The interference type can be electromagnetic or radio frequency, both of which can be defeated.
Start with plugging it into a different outlet. If that doesn't work, then unplug anything from it one device at a time to see which thing is the culprit. If it is one of the devices, move any audio cords away from power cords and/or position the device further from the television.
Household appliances and fluorescent lighting also can cause signal interference in electronics that is audible.
A device known to help with such interference are power line conditioners from such brands as Tripp lite, and ferrite clamps. You can place ferrite clamps on the power cords of your devices and their analog audio connectors.

Jan 10, 2010 | Samsung P2370HD 23 in. TV

1 Answer

Vizio GV42l buzzing


Vizio makes an ok LCD, but if you notice they no longer make plasma. they stopped last year. Anyways. the buzzing sound is semi serious, it sounds as though you have a capacitor leaking. It is best to get it fixed before it goes out all the way, with it buzzing it will be easier to identify. Best of luck

Sep 12, 2009 | Vizio GV42L 42 in. LCD Television

1 Answer

Buzzing/humming noise that increases as you raise volume. So loud that you can not even watch tv


Hello snow1525,

You may have a torn speaker element. This is usually the cause of buzzing noise in the sound, also you may have a bad capacitor in your audio section. This is what I would suggest doing as a test open the front bottom panel of your TV and visually inspect the speakers for signs of ripping and or tearing in the speaker element. If the element or elements are torn it may be possible to repair it with rubber cement or rubber paste just coat the tear with the rubber cement to hole the torn edges together and allow it to dry for two days before testing the sound. If the speaker elements are not ripped then the problem may be a bad capacitor either in the audio section (power supply) or in the filter block (usually attached to the speakers to separate bass and treble signal to the speakers.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Apr 16, 2009 | Televison & Video

1 Answer

A couple of weeks after initial setup of my brand new Onkyo XT-SR606 receiver, I noticed a loud buzzing noise that starts up approximately 10 min after the receiver is turned on. The buzzing is definitely...


The "buzz" you hear is a power hum made by the power supply transformer. It's technically called "Lamination hum" caused by the revering of electrical current through the power supply transformer. In some cases the hum can vibrate the chassis causing other loose material to vibrate. If you can, go to your dealer and check to see if other units of this same type typically make a hum this loud, and if not, see if he can solve the problem for you.

Feb 27, 2009 | Onkyo TX-SR606 Receiver

1 Answer

LG LC55 humming/buzzing


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

3 Answers

Loud buzzing noise


Out put Capacitor breaking down - needs a serive replacement if available.

Nov 13, 2006 | Sony DVP-NS55P DVD Player

Not finding what you are looking for?
LG 42LH30 42 in. LCD TV Logo

1,281 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

Computer Repairing
Computer Repairing

Level 3 Expert

14641 Answers

The Knight
The Knight

Level 3 Expert

74106 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18390 Answers

Are you a LG Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...