Question about LG 50PG20 50 in. Plasma HDTV

31 Answers

Plasma TV (LG 50PG20) electro-static sound on every image refresh

Is it normal that on a plasma TV, 9-10 feet away form the screen, I hear a electro static sound (very low) similar to a lightbub powered on (if you listen close to the light bulb, you hear the sound of electricity going through the coil). It is very low but any time the image refreshes completely to another image it is like the same sound. It can get annoying if the volume of the TV is low or if actors on screen do not talk and the image refreshes to anotherr scene.

Thanks.

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  • 10 more comments 
  • ybaril Jan 27, 2009

    Hello Wiz



    I do not have speakers or magnetic devices close to the TV yet. Eben on , when the screen refreshes to other images, it makes this low sound.

  • ybaril Jan 27, 2009

    The YV set is new (3 days). I get the same problem when connected to HD TV or standard TV.

  • ybaril Jan 27, 2009

    No phone or view box close to the TV

  • ybaril Jan 27, 2009

    When the image has settled for a few seconds, the sound kind of disappear but on a new image, scene or whatever change in the movie, this sounds comes back on the refresh and faints down again.

  • ybaril Jan 27, 2009

    Lee



    Yes I tried different sources. Same thing and it's been like that since I bought it 4 days ago. I have a proper powerbar and HDMI cable (high-end).

  • ybaril Jan 27, 2009

    Any other tips ?

  • ybaril Jan 27, 2009

    SO getting another TV brand like Panasonic will not solve the humming sound problem ?

  • ybaril Jan 28, 2009

    ANy other final opinion ?

    Tx everyone.

  • ybaril Jan 29, 2009

    Just in case...

  • ybaril Feb 10, 2009

    Clear explanation on the origin of the buzzing heard. Thank you.

  • Michael Masters
    Michael Masters May 11, 2010

    No it is not, these plasma tvs are not the best thing to invest in.
    they are really nice but, here's the catch. the burn in rate is very
    high verses an LCD screen unit. its best to not leave this plasma
    screen on a paused or idle state for long or you risk damage to the
    vital components that regulate heat.

  • Michael Masters
    Michael Masters May 11, 2010

    No it is not, these plasma tvs are not the best thing to invest in.
    they are really nice but, here's the catch. the burn in rate is very
    high verses an LCD screen unit. its best to not leave this plasma
    screen on a paused or idle state for long or you risk damage to the
    vital components that regulate heat. The static could have something to do with poor manufacturing. i would go on the lg website and check that model number for recall info.

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31 Answers

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Sir,
This is the flickering sound problem. u must replace the IC's in power supply board. Contact manufactuer if you have warranty or contact technician.

thanks good luck

Posted on Feb 10, 2009

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Usually with new screens you dont get this. With old Vacume tube T.V.'s there is a glass tube that houses a crystal that vibrates at a frequesncy above the hearing of human ears, but when they go out of whack, they vibrate off and you can hear it, also the screen flips or rollse. Hitting the T.V. back then would cause re-alighnment and would temperarily fix the issue.

Thats probably where the idea of smacking something broken will fix it, came from. Because it actually wokred back then.

With new t.v.s it may be a capicitor that failing or just a vibration.

Now L.G. is thought ot be a good brand, but even good brands can go cheap on you.

There may be a badly shilded component thats putting out background RF noise and causing another component in the speakers to be effected.

Tis happens with old Cell phones and cheap speakers, the phone would ring and you would hear pops and hissed come out of the radio.

See if there are any devices close to the T.V. that may effect it such as another T.V. A computer, other external speakers, cell phone, small fan, etc.

I have found that computer speakers are often not shielded properly and effect other items in my home like the T.V. I have also seen where I work where a User had a portable fan next to the plasma moniotr and it would cause the screen to look as if its vibrating, My digital T.V. Antena is effected by my computers CD drive when it reads a disk.

I know this sounds very weird but this is caused by RF noise generated at high frequencys we dont hear till it effects an electronic device.

My cars A.M. bands pick up the rev of my car engine and when i speen up, i hear it in the AM channels as a High and low pitch combination getting louser or lower as i speen up, slow down.

So, check al these possibilities and see if theres a culprit, remember, any electronic device could cause this issue. Speakers pick it up, but something else is probably causing it.

Good luck

Posted on Feb 10, 2009

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Please go through these facts on the buzzing sound from your TV and also keep in consideration the evnvironmental variables around the TV and see if it is still not with in the standards get in touch with your dealer.

Posted on Feb 10, 2009

  • Saroj Sharma
    Saroj Sharma Feb 10, 2009

    Nice to know the solution was of help to you...Have a great day ahead.

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Your tv set was on 3 days, and still has a warranty.

it is better to report and send it to them, notify them that the unit was defective.

better no to do anything, sometimes a little mistake can void the warranty.

the best thing to do is report it to the center you purchased the item.

you must enjoy the privileges of the warranty. i

Posted on Feb 09, 2009

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This sound like a minor separation on the back input section of the main board. i would get it checked. it may need to be re soldered in a couple of places on that main board.

Posted on Feb 07, 2009

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  • 296 Answers

The buzzing is because your power supply is going bad, over heating, or under heavy load.

Posted on Feb 07, 2009

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Hi..thats the sound of the stablizer.Ur plasma tv
comes with the inbuilt stablizer.Every time u
switch on the tv ur stablizer also gets switched
on.That's the sound u r hearing.
check it out..
thank u..

Posted on Feb 07, 2009

  • Hariharanath V Feb 09, 2009

    hi..it's normal thats nothing to worry.It will

    not affect you in any way.

    check it out..

    thanks..

  • Hariharanath V Feb 10, 2009

    hi..no worry at all.It is normal,it is the sound of

    the stabilizer.In plasma tv there is no need of

    seperate stabilizer it is inbuilt.The sound wat

    you hear is the sound of the stabilizer.It's sounds

    everytime you switch on the tv.

    check it..

    thanks..

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This is joyce
How far away is your speakers, or do you have extra speakers ? if so they have to be about 1 foot away from the tv to get good reception and not bleed into the sound of the tv unit. try this. if not you may want to call a techn to come take a look at the set.
let me know if you need any assistance finding a person to work on it
thanks
joyce

Posted on Feb 07, 2009

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Plasma TV's do tend to make this noise. I own one and it makes the same noise. You could call the TV's manufacturer or resale store to see if they can provide any extra help, but other than that what you are experiencing is completely normal. Thanks

Posted on Feb 06, 2009

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Check if there is any mobile phone or anything else near by the television.(any magnet items). If no then i think you must consult your retailer and get it checked.

Posted on Feb 06, 2009

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Check your power supply waltage and earthing working properly.
also try another power supply bord.

Posted on Feb 06, 2009

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The tv has inbuilt speakers.that speakers are the culprint.as that speakers give this static noise.that speakers are connected to the main circuit board of the tv.as that connection is loose on the board that has to be resoldered.or may be that inbuilt speakers are gone faulty and needs replacement.

Posted on Feb 03, 2009

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  • LG Master
  • 4,636 Answers

CNET gave the LG 50PG20 3***out of 5 watch the review Yet price consumers gave it a little better. As with any high voltage component there will be electrical interference. Yes as time and tweaking improves this TV we will all find something to make it better. Cheaper is not always better and some of us already know that! China makes cell phones for $2.00 and we sell them for $475.00 and a 2 year contract.
Anyway here's CNET Review
http://reviews.cnet.com/flat-panel-tvs/lg-50pg20/4505-6482_7-32863632.html

Posted on Feb 01, 2009

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This is normal and due to the high voltage used in the tv,
It being new,you are more prone to hear and see all the little details.

Posted on Feb 01, 2009

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I think you r very correct.as its the problem in the system,.
thanks any ways.
for keeping us updated.

Posted on Feb 01, 2009

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  • LG Master
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If that disturbance noise goes away after a while, than that is an internal fault.

Do a test by turning on the TV as stand alone, and eliminating all possible causes for disturbance, like big power adapters etc.

If you still get the noise then the TV has an internal fault.

Faults that can cause this, and disappear after a while are often related to faulty IC in audio circuits, or blown capacitor that is necessary for a time unitil the amp warms up.

If instead noise comes and goes , and it is related to vibrations (see whack test) then it is often a short or a bad colder joint, or a defective signal board (the board with audio/video connectors).



Posted on Feb 01, 2009

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  • 71 Answers

U will probably b suprised that some plasmas do make that sound

Posted on Jan 31, 2009

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If your in the northern hemisphere right now, and your in one of the areas where it is desert dry, then you could be hearing static tracking across the plastic of the case. This one is difficult to solve.

Has a wax been used on the case? If so, use a good cleaner (Windex like) to clean of any residues. And as goofy as this sounds, get a humidifier.

I'm here in Dallas, and it's been so dry over the past few months that everyone is having sinus issues. If you not familiar with Dallas, our RH usually swings quite a bit during the winter, but this year, it's been dry, bone dry, and static is a real problem.

Let me know your thoughts and what you find.

Posted on Jan 31, 2009

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  • 81 Answers

Hello
change all cable one one
look what happen

Posted on Jan 29, 2009

  • mohamed boyzid
    mohamed boyzid Jan 29, 2009

    change all cable one one
    look what happen

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Hi,
This problem is because of input signal... The input signal for the TV is noisy.. YOur tv is allright.. check the input signal properly and remove it and again reinsert properly.. check if there is any dust on it... normally this problem causes when two sognals collide each other.. Have any queries, please contact Fixya..

Thank you...

Posted on Jan 28, 2009

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  • 356 Answers

Hi ybaril,
If you have not already tried this:

  1. Use a different HDMI cable.
  2. Try using a different input besides HDMI, try connecting with RCA cable (red, white, yellow) this will be for diagnostic purposes only.
  3. Reseat your current HDMI cable.
  4. This the important one, Make sure your HDMI cable is not looped, stretch the cable out straight
Let me know if any of this helps.
Lone99star

Posted on Jan 28, 2009

  • Jason Morris Jan 28, 2009

    One more thing, The device you have the HDMI connected to, do you have have any other wires connected to this device going to the tv?


    That looks kinda confusing:


    If you have, say a cable box connected to the TV with an HDMI cable. Are there and other wires from the cable box to the TV?


    The reason I ask is because the HDMI carries the audio and video, so if you also have audio cables hooked up with the HDMI it could cause interference.


    Let me know.


    Lone99star

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It is not normal an electro static sound in Plasma TV. Since this is only 3 days old it is still under manufacturs warranty. Anyhting you may do to the TV may void it's warranty. I work at an authorized service center and have seen too many times when people think they can fix something themselves and end up with a voided warranty. You really should take it in or have a authorized service center come to your home and check it out for you. In home service is offered by manufacturers and is normally covered by the warranty.

Anything you may be able to do to get it working this time will most likely happen again since it has happened before. Getting it serviced by an authorized service center may fix the problem permanently.

This may not be the answer you are looking for, but it is the smartest thing you can do. A little hassle now getting it fixed properly will propably save you money and more of a hassle in the future.
Hope it may help you;

Regards;
VOTIT

Posted on Jan 27, 2009

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Have you tried calling up the Warranty Company? They are the right people for your your problem since the TV is within warranty. They will get it Fix FREE of cost.

Posted on Jan 27, 2009

  • Vanbiak Thanga
    Vanbiak Thanga Jan 28, 2009

    Have you call the warranty Company?

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If you can hear any buzzing from more than a few feet then the TV is defective and should be replaced under warranty before it fails altogether AFTER the warranty is up.

Buzzing is a common defect among plasma TVs regardless of brand. It rarely has anything to do with the plasma cells working; usually it's a defective board or a power supply problem. (see altitude and pressure change below).

My new Panasonic PZ700U is virtually silent at 2 feet away, even at 4 in the morning in a completely silent room. My older PX50U is silent at 3 feet away, and that's after it's gotten louder over the past two years. I consider anything worse than my experience to be abnormal and unacceptable.

Have it exchanged for a good one!

Alternately...

Plasma televisions are sensitive to altitude. Im not sure of your location, but it IS a small possibility you are experiencing the following -

Each manufacturer has a different altitude rating for their products, which should be respected otherwise the warranty will likely be invalidated as the product is not being used within the specifications.

The plasma display panel is a sealed enclosure comprised of Xenon, Argon, and Neon gases that are compressed into miniscule glass fixtures. These gases are ignited when your television is turned on (this is what gives you the picture). At sea level, and even up to 6,000 feet, the pressure within the fixtures and outside the fixtures is identical (or very close). Once you go above sea level, the air pressure outside changes, whereas within the plasma panel it remains fixed.

Due to the fact that there are no plasma televisions on the market that are pressurized, the pressure within the fixtures will change to match the air pressure outside the display. This is what causes the buzzing sound. This change in pressure is causing the display to work harder to maintain the same level of picture quality, which draws more power and causes the fans to spin faster. This reduces the overall life expectancy of your plasma television; however there are no hard numbers to know exactly how many hours the display will last.

It is likely that you will not notice any picture quality issues watching your television at high altitude. It is the level of noise generated by the plasma TV that you must be aware of. If you hear buzzing, popping, humming or clicking noises, there is a good chance that you have a pressure problem.
Some manufacturers have designed their plasma televisions to work in high pressure areas. NEC Corporation rates their plasma televisions to almost 10,000 feet. Prior to purchasing any plasma display panel, check the specifications to ensure that they will work at your altitude. You don’t want to have to buy a new one anytime soon!

Plasma TV (LG 50PG20) electro-static sound on ever - 572bbe3.jpg

Posted on Jan 27, 2009

  • blueextc3221
    blueextc3221 Feb 01, 2009

    still under warranty - take it back for a new one!!



    Thanks for using FixYa - a FixYa rating is appreciated!!

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Yes its normal. Make sure there is no fluorescent bulb or tube on in that area.

Thanks

Posted on Jan 27, 2009

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Take the tv back and ask for another one....theres something wrong with the one you have since you should not have tht static sound.they shouold replace the tv or give you a refund of the urchase price. you dont want it to become a major issue before you even get the chance to use it for very long so take it back to the store and get another one

Posted on Jan 27, 2009

  • Ronnie Houston Feb 03, 2009

    no its not normal to hear that sound.id take it back to th store and get it replaced or get a different brand altogether

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It is normal. The display element in plasma TVs is actually a glass substrate envelope with rare natural gases compressed therein. So then power up plasma displays emit a buzzing sound. This noise can sound rather like the humming of an old neon sign.
Good Luck

Posted on Jan 27, 2009

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There could be a few causes to this. have you tried a different input like on dvd, is it the same no matter what source your using? Also do you have the tv and components hooked up to a good surge protector that is properly grounded. There are quite a few things that could cause this. Has it always been like this? Once I have more information I can assist you further, also please take a moment to accept and rate my solution accordingly.
Thank you,
Lee

Posted on Jan 27, 2009

  • Lee A.
    Lee A. Jan 27, 2009

    actually being that it is only 4 days old, exchange the tv for one of the exact same model. Most likely you have a defective tv set. You can try to change audio cables and such, but most likely its your tv set, and being it is 4 days old. It would be best to just return it and exchange it for one of same model. If you need further assistance please let me know. Also please take a moment to accept and rate my solution accordingly.
    Thank you,
    Lee


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Welcome to Fixya! From what I have Researched Online and Here in the Archives, This is Pretty Common and Has not caused any Problems to Date. I think that it will probably be just Fine.

Posted on Jan 27, 2009

  • Travis Humphries
    Travis Humphries Feb 01, 2009

    Welcome to Fixya! I have Contacted LG on this Problem. They Recommend an Authorized Repair Center in your area as this is a Very Unusual Problem. I would try and Return the Set and get another one on Exchange so that you will not be without. Please Rate My Response! Thanks!

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  • 50 Answers

No it is not normal check that ur phone and free view box,digiti box is 10-15 feet away form ur tv

Posted on Jan 27, 2009

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  • 326 Answers

Its quite normal .check wether you have some magnetic field close to it may be high sound speakers or some other such devices.keep them away to reduce this sound.

Posted on Jan 27, 2009

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LG 50PG20 Plasma,, nothing shows on screen its all black


This model was known for issues with the Y-sustain, Y-drives, and the Z-sustain boards. These boards help process the picture image to the screen.

When one or more of these boards fail, the screen stays black, and you only have audio & on/off.

You could call LG and try to get your TV repaired at a discount if you can convince LG to honor this known issue.

Another issue could be the actual panel has gone bad. The plasma panel in your TV has a two warranty and LG would fix that for free. Well…it would be free as long as it’s not past two years of your date of purchase.

What zip code are you in?

Jun 18, 2010 | LG 50PG20 50 in. Plasma HDTV

1 Answer

My lg-50PG20 powers up and has sound but no display. is it the control board or main board?


Study the screen at several different angles; you should be able to see some ghostly images if the video chain is OK. If you can see this, either the backlight supply or fluorescent light source has failed.

Jun 19, 2009 | LG 50PG20 50 in. Plasma HDTV

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