Question about LG 42PC5D Television

Open Question

LG 42PC5D, humming sound

The TV makes this humming/buzzing sound when it's on. It comes from the left side of the TV (where the front component inputs are). I actually exchanged it last night for another TV (same model). It's the same thing, not as loud though. A tech guy at Best Buy told me that it might be the built-in HDTV tuner, and that I can download an update from the internet and install it into the TV. Anyways, if anyone has some input it would be appreciated.

Posted by on

6 Suggested Answers

  • 1 Answer

SOURCE: 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

Posted on Mar 12, 2008

  • 3 Answers

SOURCE: hdtv

It means that it has the HD decoder built in to the tv

Posted on Oct 15, 2008

  • 1 Answer

SOURCE: trying to set up hdtv antenna - have lg 42pc5d

cable got installed but i cant make it work

Posted on Apr 29, 2009

  • 4234 Answers

SOURCE: Component input colour is messed up

Please describe in more detail how the colors are not correct. That should help me to determine the problem.


Posted on Feb 05, 2010

SOURCE: LG 42 Cm HDTV TV Twin built in tuners turns its Above is your user manual, below is your service and repair manual.

Posted on May 27, 2010

  • 1 Answer

SOURCE: tv making loud buzzing noise

I tried Electcentric's solution of dialing the backlight up to 100 and that worked, unclear if there will be a downside to it, but the buzzing has definitely gone.

Posted on Sep 21, 2013

Add Your Answer

0 characters

Uploading: 0%


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


1 Points

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

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

Humming sound

Samsung states - A buzzing sound from your plasma TV is normal. It is caused by the electrical charges used to create the images on the screen. The buzzing, however, should not be so loud that you can hear it when the volume on the TV is set at normal levels.It is also important to determine the type of buzzing sound. A sound like a ground hum is completely normal. This buzzing can originate near the power cord connection or from the SMPS board position on the upper back of the TV. The buzz will be more audible as contrast increases on the screen, most notably when displaying an all white screen. If the buzzing sound is loud, you may have the Contrast set too high. Lower the contrast to reduce or eliminate the buzzing.You may also have loud buzzing if the rear of your Plasma TV is too close to a wall or other hard surface. Try moving your TV away from the wall until the buzzing is minimized. [1]
If the buzzing is at a higher frequency and resembles a crackling sound (like the sound of Velcro being pulled apart), and originates from the upper middle back of the TV, you likely have a failing SMPS board. Place a support call with Samsung to have the SMPS board replaced.FP-T5084 Have a known buzzing problem with a very simple fix.If the buzzing is coming from the left or right sides of the rear and the volume can be changed by pressing lightly on those locations, you are probably hearing the vibration of the grounding springs on the back panel. Call Samsung (or whoever) and have a technician confirm the problem. The easiest fix is to insulate the offending spring by applying some felt tape.

May 22, 2010 | Vizio P2 42 in. HD-Ready Plasma Television

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

Trying to set up hdtv antenna - have lg 42pc5d

cable got installed but i cant make it work

Apr 29, 2009 | LG 42PC5D Television

1 Answer

I have sound but no picture on my LG 42PC5D-AB Plasma TV. I have checked the cables and they are all connected ok. turned on this morning and there was sound and no picture

If the display is totaly blank from turning the set on it sounds to me that the display is gone and all you can do is replace the display witch for a 42" set it woudl be cheaper to replace.

Mar 10, 2009 | LG 42PC5D Television

2 Answers

No picture

The suggested repair is correct - "won't happen again" is a pipe dream. Best you can do put a UPS on the TV, which addresses one situation.

Jun 19, 2008 | LG 42PC5D Television

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

1 Answer

Home theater system connections

I have the same tv but my dvd surround is a toshiba, that shouldn't matter though. When I watch a dvd I go to component 2 which is where I have my dvd connected on the input of the tv when I watch tv and want the surround on I go to component 1 which is the tv input then on my dvd player I go to auxillary and I can watch tv in surround. I don't know the LG home theatre system but you should be able to select your inputs like between dvd, tuner, aux. Flip between them and you should get sound. hope this helps.

Oct 15, 2007 | LG 42PC5D Television

2 Answers

LG 42PC5D Sound Lag

Turn the volume on the TV all the way down. Its becasuse you have the sound come from both sources. its kinda fun to play with.

Sep 24, 2007 | LG 42PC5D Television

Not finding what you are looking for?
Flat Panel Televisions Logo

Related Topics:

65 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Flat Panel Televisions Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers


Level 3 Expert

6993 Answers


Level 3 Expert

18258 Answers

Are you a LG Flat Panel Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides