Plasma buzzing

EndersShadowEndersShadow Posts: 14,946
edited December 2 in Electronics
I know a few of us have or still have Panasonic Plasmas.

Early this morning mine started developing loud buzzing sound from the rear panel.

It still works fine but it’s driving me batty as I can hear it 10 feet away if I mute the TV.

I’ve holding my hand against with the flimsy rear panel and that makes it lower but then I goes back up when I let go.

And weirdly turning down the contrast helps a bit too, but I can only go so low

Is there anything I can do to do to fix this?
"....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)

Comments

  • BlueMDPickerBlueMDPicker Old Polk Posts: 6,607
    We've had our 58" Panasonic plasma since 2006. While I can't offer a possible reason for the buzzing you're experiencing, the good news is the TV is completely modular with respect to various controller boards. I have replaced the digital input board on ours two times due to electrical surges caused by nearly direct lightning strikes. So, if you can isolate the noise source, perhaps it's something you can fairly easily replace? Hope so. Good luck!

    Main 2CH: Wadia 301 CDP | MacBook Air | PS Audio Digital Link III DAC with Cullen Level IV mods | Bluenote Bellavista turntable with Boston Audio Design "The Mat 1", B5 Signature Arm and DV-20X2H | The Clamp | PS Audio GCPH phono preamp | PS Audio GCP-200 preamp with external PS | Innersound active crossover/bass amp | Sanders Sound ESL panel amp | SVS PB12-Ultra/2 sub | Innersound Eros MK III Hybrid ESL speakers horizontally bi-amped | PS Audio PerfectWave P3 Power Plant | All cabling MIT Shotgun S1 | GIK acoustic treatments

  • Viking64Viking64 Posts: 754
    I have yet to experience anything like this on my TC-P65S2 that I bought in 2010. I did replace the YMAIN board in 2013, which was a common issue with those models.

    And I agree with BlueMDPicker. The boards are fairly easy to replace. The larger the screen, the easier, as things aren't so cramped as they are on the smaller models. Although the larger models tend to have costlier parts.

    Doing a Google search of the model number and "buzzing sound" will likely bring you to a forum with a wealth of information. And once you find what part is the culprit, there is probably a YouTube video showing how to replace it. :)
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  • mrbironmrbiron Posts: 4,479
    Mine buzzes. I just turn up the volume. ;)
    My screen fluctuates as well.
    Zu Audio Omen MK-1B's, Peachtree Decco65, Bryston BDA-2, Cheap TT, PS Audio UPC200, PS Audio AC3's, Zu Mission SC's, HTPC, One, Bottlehead Reduction & Crack w/Speedball
  • ken brydsonken brydson Posts: 6,563
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)
    HT/Main- Panny 50" G10 Plasma, Pioneer SC-1222k AVR, Panny DMP-BD60 BDP, Polk LS90 mains, CS350LS center, LS/fx side surrounds, LS50 surround backs, SVS 25-31PC+ sub, Harmony One

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  • EndersShadowEndersShadow Posts: 14,946
    From what I'm reading, its likely the ferrite cores on the unit vibrating against the flismy metal on the back.

    If this thing wasn't wall mounted (and 100+ lbs), I'd pull it off, take the back off and then either dynamat the OUTSIDE of the back, or do what the suggest, which is wrap the back of the cores with electrical tape and then put the back on.

    Maybe next weekend when I have friends over, I will think about it.
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
  • F1nutF1nut Posts: 38,311
    There are small fans back there, it's possible one of those is bad.
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  • sgmsmgsgmsmg Posts: 225
    It might also just the area where the fans are need cleaning.
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  • jeremymarcinkojeremymarcinko Posts: 2,810
    Mine always buzzed a little. More when DC was present on the line.
    Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
  • Rich502Rich502 Posts: 66
    My Panasonic plasma always buzzed when I dimmed the recessed lights in my room. The more I dimmed the louder the buzz became, which totally went away once I turned the lights off. Is there anything on the line, even in another room that may be causing the noise?
  • jeremymarcinkojeremymarcinko Posts: 2,810
    Holiday lights?
    Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
  • EndersShadowEndersShadow Posts: 14,946
    Rich502 wrote: »
    My Panasonic plasma always buzzed when I dimmed the recessed lights in my room. The more I dimmed the louder the buzz became, which totally went away once I turned the lights off. Is there anything on the line, even in another room that may be causing the noise?

    Now that you mention it we do have Christmas lights we JUST put up.

    That said, the TV and my two amps are on dedicated 20 amp circuits so the house would have to be going to he panel then back onto the TVs circuit
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
  • BlueMDPickerBlueMDPicker Old Polk Posts: 6,607
    Could it be electromagnetic induction associated with holiday lighting?

    Main 2CH: Wadia 301 CDP | MacBook Air | PS Audio Digital Link III DAC with Cullen Level IV mods | Bluenote Bellavista turntable with Boston Audio Design "The Mat 1", B5 Signature Arm and DV-20X2H | The Clamp | PS Audio GCPH phono preamp | PS Audio GCP-200 preamp with external PS | Innersound active crossover/bass amp | Sanders Sound ESL panel amp | SVS PB12-Ultra/2 sub | Innersound Eros MK III Hybrid ESL speakers horizontally bi-amped | PS Audio PerfectWave P3 Power Plant | All cabling MIT Shotgun S1 | GIK acoustic treatments

  • jeremymarcinkojeremymarcinko Posts: 2,810
    edited December 3
    Could be any DC on the mains. I have an Emotiva CMX2 that eliminates DC, which I purchased for an ATI amp that was susceptible to tranny buzz from DC. Prior to the CMX2 when the Amp buzzed so did the plasma. As you said the brighter the picture the louder the buzz.
    Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
  • EmlynEmlyn Posts: 1,912
    If it is the Christmas lights it would be because of EMI coming from the unshielded wires. As long as they are plugged in it could cause interference regardless of the electrical circuit being different. Unplug and see if the issue resolves.

    My guess though is a dirty fan wobbling. If reachable, a can of compressed air may resolve it.
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  • nbrowsernbrowser Posts: 7,020
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)

    Buy a cheap Ninendo Wii on craigslist...get a sports game and "accidentally" chuck the controller at the screen while playing....bowling! Hard as possible...then go buy a new TV. :)
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  • txcoastal1txcoastal1 Posts: 8,476
    nbrowser wrote: »
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)

    Buy a cheap Ninendo Wii on craigslist...get a sports game and "accidentally" chuck the controller at the screen while playing....bowling! Hard as possible...then go buy a new TV. :)

    Ken you forgot one thing....blame it on the kids B)
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures, Simaudio 780D DAC
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  • EndersShadowEndersShadow Posts: 14,946
    nbrowser wrote: »
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)

    Buy a cheap Ninendo Wii on craigslist...get a sports game and "accidentally" chuck the controller at the screen while playing....bowling! Hard as possible...then go buy a new TV. :)
    txcoastal1 wrote: »
    nbrowser wrote: »
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)

    Buy a cheap Ninendo Wii on craigslist...get a sports game and "accidentally" chuck the controller at the screen while playing....bowling! Hard as possible...then go buy a new TV. :)

    Ken you forgot one thing....blame it on the kids B)

    Ain’t no got no money to replace it with fellas.

    Weirdly enough later yesterday the HDMI 1 inputs started looking weird and grainy, so we switched to HDMI 2, and the picture is back to good, and by adjusting the contrast down a bit the humming is gone.
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
  • tonybtonyb Posts: 27,822
    nbrowser wrote: »
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)

    Buy a cheap Ninendo Wii on craigslist...get a sports game and "accidentally" chuck the controller at the screen while playing....bowling! Hard as possible...then go buy a new TV. :)
    txcoastal1 wrote: »
    nbrowser wrote: »
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)

    Buy a cheap Ninendo Wii on craigslist...get a sports game and "accidentally" chuck the controller at the screen while playing....bowling! Hard as possible...then go buy a new TV. :)

    Ken you forgot one thing....blame it on the kids B)

    Ain’t no got no money to replace it with fellas.

    Weirdly enough later yesterday the HDMI 1 inputs started looking weird and grainy, so we switched to HDMI 2, and the picture is back to good, and by adjusting the contrast down a bit the humming is gone.

    Hope you realize Dan, that set is on it's last legs. After the new year, start looking on your local craigslist for another tv on the cheap.
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  • EndersShadowEndersShadow Posts: 14,946
    tonyb wrote: »
    nbrowser wrote: »
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)

    Buy a cheap Ninendo Wii on craigslist...get a sports game and "accidentally" chuck the controller at the screen while playing....bowling! Hard as possible...then go buy a new TV. :)
    txcoastal1 wrote: »
    nbrowser wrote: »
    Never an issue with mine. Looking for an excuse to replace it. No luck (wife)

    Buy a cheap Ninendo Wii on craigslist...get a sports game and "accidentally" chuck the controller at the screen while playing....bowling! Hard as possible...then go buy a new TV. :)

    Ken you forgot one thing....blame it on the kids B)

    Ain’t no got no money to replace it with fellas.

    Weirdly enough later yesterday the HDMI 1 inputs started looking weird and grainy, so we switched to HDMI 2, and the picture is back to good, and by adjusting the contrast down a bit the humming is gone.

    Hope you realize Dan, that set is on it's last legs. After the new year, start looking on your local craigslist for another tv on the cheap.

    I’m gonna price out a new HDMI board as I very much like the set.

    Maybe move it to the loft and find a Insignia or Visio 60+ tv for downstairs or something. I’ve been fairly impressed with my other two Insignias.
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
  • BlueMDPickerBlueMDPicker Old Polk Posts: 6,607
    I’m gonna price out a new HDMI board as I very much like the set.

    They were running $125-$140 used/refurbished when I replaced mine. Never ran across a new one. Make sure you find the exact board number for best results. On my set, there were 4 variations (designated via suffixes) of the HDMI I/O board.


    Main 2CH: Wadia 301 CDP | MacBook Air | PS Audio Digital Link III DAC with Cullen Level IV mods | Bluenote Bellavista turntable with Boston Audio Design "The Mat 1", B5 Signature Arm and DV-20X2H | The Clamp | PS Audio GCPH phono preamp | PS Audio GCP-200 preamp with external PS | Innersound active crossover/bass amp | Sanders Sound ESL panel amp | SVS PB12-Ultra/2 sub | Innersound Eros MK III Hybrid ESL speakers horizontally bi-amped | PS Audio PerfectWave P3 Power Plant | All cabling MIT Shotgun S1 | GIK acoustic treatments

  • EndersShadowEndersShadow Posts: 14,946
    I’m gonna price out a new HDMI board as I very much like the set.

    They were running $125-$140 used/refurbished when I replaced mine. Never ran across a new one. Make sure you find the exact board number for best results. On my set, there were 4 variations (designated via suffixes) of the HDMI I/O board.

    Good to know. Any reputable sources for boards or ones to stay away from?
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
  • BlueMDPickerBlueMDPicker Old Polk Posts: 6,607
    Lol! Just checked my bookmarks and BOTH the companies I've purchased from seem to be defunct: tristatemodule.com and moduslinkptstvboards.com

    Tough business!

    Once you get the exact board number, you might try a saved search on eBay until one pops up. Good luck. You'll be a huge fan of their circuit design engineers when you've completed the fix.

    Main 2CH: Wadia 301 CDP | MacBook Air | PS Audio Digital Link III DAC with Cullen Level IV mods | Bluenote Bellavista turntable with Boston Audio Design "The Mat 1", B5 Signature Arm and DV-20X2H | The Clamp | PS Audio GCPH phono preamp | PS Audio GCP-200 preamp with external PS | Innersound active crossover/bass amp | Sanders Sound ESL panel amp | SVS PB12-Ultra/2 sub | Innersound Eros MK III Hybrid ESL speakers horizontally bi-amped | PS Audio PerfectWave P3 Power Plant | All cabling MIT Shotgun S1 | GIK acoustic treatments

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