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Needhelp: Plasma buzzing (Panasonic ST50) - When is it not acceptabel? - Page 2

post #31 of 221
Quote:
Originally Posted by brannigan View Post

I traded in my st60 twice and all 3 buzz the same. Panasonic just messed up when they designed it. Some test group probably showed that most people didn't mind it and they sent it through even though you would have to own it to fully realize how annoying it is. Hopefully they fix it on the newer models. I had to get used to it for awhile and it gets easier but still irritates me sometimes when I'm trying to enjoy a movie and a long quiet scene with the right colors to crank up the buzzing comes on and drives me insane for a couple minutes. Kind of messes up the moment and takes you out of the movie. Anyone that doesn't hear it is lying or has hearing problems.
I just went to a local FutureShop and listened to a GT50 and ST50 they had side by side. No buzz at all even on bright scenes (and I put the GT50 in torch mode - Vivid, 100% contrast, etc., which I am nowhere close at home). Yes, the noise in the store is loud but I put my ear to the panel and could barely discern quiet hum on the mostly white scenes. When I have the volume loud at my house, I can still hear the buzz when I do exactly the same thing I did at the store. There IS a variation in the buzzing loudness between panels.
Edited by 2tvsonecup - 12/15/12 at 5:55pm
post #32 of 221
I don't know why I keep forgetting the model I have. It's an st30. My mistake. It sounds like you might have a better chance finding a quiet one with the st50's.
post #33 of 221
Thread Starter 
Quote:
Originally Posted by brannigan View Post

That depends on you. What bothers you more? Occasional buzzing that you get used to after awhile or or crappy viewing angles/motion blur/less realistic colors?

Buzzing ruins the experience and girlfriend won't tolerate it.
post #34 of 221
Well, one guy in the thread thinks you might have a chance to get a non buzzer. Just have panasonic send somebody to your place to swap out the boards until it stops buzzing. It didn't work for me but I have an st30. Or get an lcd if they look good to you. I personally don't like them as much but they CAN be pretty nice if you get the right one (I hear). It just seems like there's always weird artifacts at certain times depending on whats on the screen.
post #35 of 221
Thread Starter 
Wish it worked like that here. Panasonic said I should talk to the retailer, they say its normal and I should talk to Panasonic, and round and round it goes. So I've had to force a return upon the retailer and do it three times in a row now with a buzzing tv all three times. And it's starting to become a mentally stressing process.
post #36 of 221
I didn't know you had already swapped 3 times. Looks like it's not going to work out. 3 defects in a row is almost impossible. 3 defects in a row with the exact same problem is literally impossible. Like, mind bogglingly unlikely. Like getting hit by lightning 3 times in a month.
post #37 of 221
Quote:
Originally Posted by brannigan View Post

I didn't know you had already swapped 3 times. Looks like it's not going to work out. 3 defects in a row is almost impossible. 3 defects in a row with the exact same problem is literally impossible. Like, mind bogglingly unlikely. Like getting hit by lightning 3 times in a month.

It does seem impossible, yet there are many people here over the years who have gotten 2 or 3 bad TVs in a row with the 3rd or 4th one finally being a keeper. This has happened on all brands (not just Panasonic) and we see posts about this happening every year. It's even like this over in the LCD forum - maybe even moreso than over here.

And remember there are several different possible defects inside a Plasma TV that can all cause buzzing so one TV might have a bad/buzzing input board, the next might have a bad/buzzing panel, the 3rd might have a bad/buzzing power supply, and the 4th might just have loose board screws (which usually causes excessive buzz). Any of these problems can cause the excessive buzzing, so the buzzing in itself isn't a defect, it's a result of one of several other possible defects. A defective coil seems to be the most common cause of buzzing, and there are a lot of coils inside a Plasma TV on the various boards and even on the Plasma Panel Module itself. Bad coils buzz.

Hell, the very first Plasma TV i ever saw was a 1999 or 2000 Fujitsu at a high-end AV store and it buzzed like a hornets nest, but they got it fixed and it was quiet after that. It wasn't normal back then, and it isn't normal today.
post #38 of 221
Quote:
Originally Posted by brannigan View Post

I didn't know you had already swapped 3 times. Looks like it's not going to work out. 3 defects in a row is almost impossible. 3 defects in a row with the exact same problem is literally impossible. Like, mind bogglingly unlikely. Like getting hit by lightning 3 times in a month.

Four manufacturer defects in a row for me on 65VT50s mad.gif But I can say that my 4th set had virtually zero buzzing even on the brightest of slides.... had an Oct. 2012 build date if that helps. However, it had to be returned with tears for a different defect as I initially thought I finally got one that was perfect.
post #39 of 221
So no one here has had a technician successfully repair their panel to stop buzzing? Everyone just keeps exchanging?

So if I get some jerk that doesn't want to take the time to swap boards, etc can I request another technician to come from another repair company? My worry is they will all deny the buzzing being a defective part and then Panasonic warranty unit blackball you from service.

I really am lost as to the best way to approach this issue to be honest. I have no IR issues with my set, blobs, or significant banding. Just see some rainbow effect, but I don't think that's a panel problem rather an issue with my eyes. Meh,..spending money on fun things shouldn't be this stressful.
post #40 of 221
Quote:
Originally Posted by UrbanConquest View Post

So no one here has had a technician successfully repair their panel to stop buzzing? Everyone just keeps exchanging?
So if I get some jerk that doesn't want to take the time to swap boards, etc can I request another technician to come from another repair company? My worry is they will all deny the buzzing being a defective part and then Panasonic warranty unit blackball you from service.
I really am lost as to the best way to approach this issue to be honest. I have no IR issues with my set, blobs, or significant banding. Just see some rainbow effect, but I don't think that's a panel problem rather an issue with my eyes. Meh,..spending money on fun things shouldn't be this stressful.

The first thing is to check the build date. At least with the VT50s, the earlier build dates had an issue with the type of screw used inside the set. Technician would come out, open the set, change out the screws and sometimes that lessened the buzz. Others have had the board changed out with either positive or negative results. I kept exchanging because since I was still within the exchange period, so why go through the hassle of waiting to have a technician out, try to fix it, then discover you are out of the exchange period. If you are out of the exchange period but within the warranty, you have no choice but to have a technician come out and try to perform surgery on the set. All of the panasonic plasmas will buzz to some degree, but as Randy Walters points out in previous posts you should not be able to hear it from a normal viewing distance let alone over any volume. If it buzzes and you can hear it from say 8 to 10 ft, it is defective. Don't let them tell you otherwise. If it buzzes and you have your ear up to the side of the set, then that is normal and what they mean as it being normal.
post #41 of 221
My newly acquired set also has the buzzing sound which can be heard from 8+ feet away during bright scenes. Even with all settings at 50%, a buzz can be heard on the three “whitest” slides from the panel prep files. Two examples…

  1. Tonight’s episode of Chicago Fire. There was a scene inside a kitchen with all glass windows. With the volume at zero, it went buzzzzzzz when it showed a bright shot of all the windows and when it switched to close-ups of the characters it was silence, then buzzzz again…
  2. With sound, there were several commercials which ended on bright backgrounds with silence at the end of commercial. You could hear the buzzzzzz……

What’s funny is this was going to replace my current 12G set with the rising black issue. I did the panel prep that D-Nice prescribed back then and I can tell you it never buzzed like this at anytime. I’ve learned to live with the decreased black levels on the 12G, but buzzing on the 50 is another thing. I’ve bought two Panasonic’s now and each one has been “defective” in some way. Burn me once, shame on you. Burn me twice, shame on me.

I’m either going to return it outright, or do one exchange and see what I get. To say I was disappointed with Panasonic right now, would be an understatement.
post #42 of 221
Quote:
Originally Posted by LMeyer View Post

My newly acquired set also has the buzzing sound which can be heard from 8+ feet away during bright scenes. Even with all settings at 50%, a buzz can be heard on the three “whitest” slides from the panel prep files. Two examples…
  1. Tonight’s episode of Chicago Fire. There was a scene inside a kitchen with all glass windows. With the volume at zero, it went buzzzzzzz when it showed a bright shot of all the windows and when it switched to close-ups of the characters it was silence, then buzzzz again…
  2. With sound, there were several commercials which ended on bright backgrounds with silence at the end of commercial. You could hear the buzzzzzz……
What’s funny is this was going to replace my current 12G set with the rising black issue. I did the panel prep that D-Nice prescribed back then and I can tell you it never buzzed like this at anytime. I’ve learned to live with the decreased black levels on the 12G, but buzzing on the 50 is another thing. I’ve bought two Panasonic’s now and each one has been “defective” in some way. Burn me once, shame on you. Burn me twice, shame on me.
I’m either going to return it outright, or do one exchange and see what I get. To say I was disappointed with Panasonic right now, would be an understatement.

If you can hear it from over 8ft away it is defective. To the degree of what you can tolerate is the more important question. For instance, try watching Ice Age 3 and if you can hear buzzing even when the movie is playing with sound, get rid of it immediately. If you can only hear buzzing when there is no sound, then it may not be worth exchanging for one that may have worse buzzing or other issues such as being more prone to severe IR, dead pixels, etc.
post #43 of 221
Quote:
Originally Posted by cmay91472 View Post

If you can hear it from over 8ft away it is defective. To the degree of what you can tolerate is the more important question. For instance, try watching Ice Age 3 and if you can hear buzzing even when the movie is playing with sound, get rid of it immediately. If you can only hear buzzing when there is no sound, then it may not be worth exchanging for one that may have worse buzzing or other issues such as being more prone to severe IR, dead pixels, etc.
I can only hear buzzing from 12 feet away when there is no sound but it still bothers the heck out of me. There are instances where a scene is both bright and silent and I don't want to hear a buzz from my TV in those moments. The Panasonic tech that came to inspect my panel said that is normal but I am not willing to accept it given that I've personally witnessed sets that are much quieter.
post #44 of 221
Quote:
Originally Posted by brannigan View Post

Anyone that doesn't hear it is lying or has hearing problems.

Aww, you caught us...
post #45 of 221
I'm sorry for you guy's suffering (my GT50 buzzes too on white scenes, but the positives in the set outweigh it, so I am not bothered by the buzz), but why do you want to watch TV with no sound?

You can't beat a kick-a$$ surround sound system that will drown out any little buzz.
post #46 of 221
Thread Starter 
Quote:
Originally Posted by Rschissler View Post

I'm sorry for you guy's suffering (my GT50 buzzes too on white scenes, but the positives in the set outweigh it, so I am not bothered by the buzz), but why do you want to watch TV with no sound?
You can't beat a kick-a$$ surround sound system that will drown out any little buzz.

Because my apartment is not made for that, plus it's not what I'm interested in.

I can hear my tv buzz when I watch the news, or watch any kind of normal programming and anything is shot outside. If that's the compromise one has to make with plasma to get the picture quality, it's not a technology that works for me then.
post #47 of 221
Does the buzzing get any better over time? I have 25 hours on mine and can hear it at 12 feet on white scenes.
post #48 of 221
Quote:
Originally Posted by johnnylighton View Post

Does the buzzing get any better over time? I have 25 hours on mine and can hear it at 12 feet on white scenes.

Buzzing will not get better over time if your set truly has a buzzing manufacturer defect. If you can hear it from 12 ft away, exchange it while you still can. Check the build date. If it is prior to Oct. 2012, then your set buzzes for one of two reasons most likely.....

1 - Screws used on the inside of the set need to be replaced with a set of different screws as these older screws were one source of the buzzing.
2 - Board needs to be changed out.

Sets manufactured Oct 1012 and later already have the new screws inside. If you are out of your exchange period but within warranty.... those are the two steps the technician who they send out will try before they consider replacing. As someone mentioned, the Panny plasmas will buzz, but a properly working one should not be heard from 12ft away and ultimately the positives of the picture will outweigh the negative of the buzzing for many.... but 12ft away is unacceptable regardless of volume or no volume.
post #49 of 221
Quote:
Originally Posted by johnnylighton View Post

Does the buzzing get any better over time?

No. It may actually get even worse (my old PX50U is getting louder as it gets older).

Quote:
I have 25 hours on mine and can hear it at 12 feet on white scenes.

I would have returned that TV 24 hours and 55 minutes ago !! That TV is seriously defective if you can hear it from that far away. That's worse than my friend's first 60ST30 that was defective, and was replaced with one that is virtually silent.

Exactly what part of the TV is that buzzing coming from? Upper left corner by any chance? Or the area directly above the power cord connection?

Is the buzzing louder with your ear a foot from the rear of the TV or with your ear a foot from the front of the TV?

Or do you hear it when seated dead center in front of the screen but not when sitting off to the sides?
Edited by RandyWalters - 12/16/12 at 2:13pm
post #50 of 221
Quote:
Originally Posted by cmay91472 View Post

Buzzing will not get better over time if your set truly has a buzzing manufacturer defect. If you can hear it from 12 ft away, exchange it while you still can. Check the build date. If it is prior to Oct. 2012, then your set buzzes for one of two reasons most likely.....
1 - Screws used on the inside of the set need to be replaced with a set of different screws as these older screws were one source of the buzzing.
2 - Board needs to be changed out.
Sets manufactured Oct 1012 and later already have the new screws inside. If you are out of your exchange period but within warranty.... those are the two steps the technician who they send out will try before they consider replacing. As someone mentioned, the Panny plasmas will buzz, but a properly working one should not be heard from 12ft away and ultimately the positives of the picture will outweigh the negative of the buzzing for many.... but 12ft away is unacceptable regardless of volume or no volume.
I've had 2 ST50's, one from October and one from November and they both buzz that can be heard from 12 feet away. Panel lottery is what this is with the buzzing. Seems like this is the case with a lot of TVs these days. I went through 3 Samsung LEDs that had horrible flashlighting and clouding before I found a Sony LED that was pretty good. My faith in today's TV manufacturer's QC is not very high right now.
post #51 of 221
Quote:
Originally Posted by cmay91472 View Post

Buzzing will not get better over time if your set truly has a buzzing manufacturer defect. If you can hear it from 12 ft away, exchange it while you still can. Check the build date. If it is prior to Oct. 2012, then your set buzzes for one of two reasons most likely.....
1 - Screws used on the inside of the set need to be replaced with a set of different screws as these older screws were one source of the buzzing.
2 - Board needs to be changed out.
Sets manufactured Oct 1012 and later already have the new screws inside. If you are out of your exchange period but within warranty.... those are the two steps the technician who they send out will try before they consider replacing. As someone mentioned, the Panny plasmas will buzz, but a properly working one should not be heard from 12ft away and ultimately the positives of the picture will outweigh the negative of the buzzing for many.... but 12ft away is unacceptable regardless of volume or no volume.
I've had 2 ST50's, one from October and one from November and they both buzz that can be heard from 12 feet away. Panel lottery is what this is with the buzzing. Seems like this is the case with a lot of TVs these days. I went through 3 Samsung LEDs that had horrible flashlighting and clouding before I found a Sony LED that was pretty good. My faith in today's TV manufacturer's QC is not very high right now.
post #52 of 221
Thread Starter 
Where do I check manufacture date on a TV set?
post #53 of 221
Quote:
Originally Posted by cmay91472 View Post

Buzzing will not get better over time if your set truly has a buzzing manufacturer defect. If you can hear it from 12 ft away, exchange it while you still can. Check the build date. If it is prior to Oct. 2012, then your set buzzes for one of two reasons most likely.....
1 - Screws used on the inside of the set need to be replaced with a set of different screws as these older screws were one source of the buzzing.
2 - Board needs to be changed out.
Sets manufactured Oct 1012 and later already have the new screws inside. If you are out of your exchange period but within warranty.... those are the two steps the technician who they send out will try before they consider replacing. As someone mentioned, the Panny plasmas will buzz, but a properly working one should not be heard from 12ft away and ultimately the positives of the picture will outweigh the negative of the buzzing for many.... but 12ft away is unacceptable regardless of volume or no volume.

So are you suggesting one can call Panasonic and have this board and/or screws changed on on site to mitigate (or eliminate) this problem on older builds?

That might be an interesting option.
post #54 of 221
Quote:
Originally Posted by Vinterbird View Post

Where do I check manufacture date on a TV set?

On the ST50 it's on a sticker on the back of the panel in the middle, with the serial #.
post #55 of 221
Quote:
Originally Posted by rogo View Post

So are you suggesting one can call Panasonic and have this board and/or screws changed on on site to mitigate (or eliminate) this problem on older builds?
That might be an interesting option.

Given the number of people who have reported Success in Effectively Silencing the buzzing via a simple screw tightening / replacement, would certainly give it a try.

If already out of warranty, would even attempt the procedure as a DIY operation, albeit with a bit of help & All Due Caution...
post #56 of 221
Quote:
Originally Posted by jbdan View Post

Indeed, hence my post. I think some just don't buzz. I should have just said that instead of my round-about reply
edit: btw good luck if you decide to try another
Thanks. I decided to do a 2nd exchange. Hopefully, 3rd time's the charm. The retailer currently doesn't have the 65 inch in stock but they offered to let me keep my current one until they get new ones and then do the exchange so I may not get the replacement for a couple of weeks. They do have the 60 inch GT50 for the same price but I'd rather have the 5 extra inches than THX, which is pretty much the only noteworthy difference to me.
post #57 of 221
My 60GT50 buzzes on bright white screens, although not as loudly as my Pioneer Plasma panel buzzes. I never really paid attention to the buzzing on the Pioneer and it really didn't bother me. I would have felt the same about the Panasonic if I hadn't read this forum.

A couple observations. The Pioneer buzzes some even on darker screens while the Panasonic makes little if any noise. I think the contrast between the dark and light screens may make it a bit more noticeable on the Panasonic even though the buzzing isn't as loud overall. Also, the buzzing on the Panasonic is very directional in nature. When I am in my normal seat directly in front of the TV, I can hear it. If I mover just 3ft left or right of center (same distance), it disappears.
post #58 of 221
Quote:
Originally Posted by rmallen View Post

Also, the buzzing on the Panasonic is very directional in nature. When I am in my normal seat directly in front of the TV, I can hear it. If I mover just 3ft left or right of center (same distance), it disappears.
That's not how my ST50 buzzes. Mine can be heard from anywhere in the room.
post #59 of 221
Quote:
Originally Posted by rmallen View Post

Also, the buzzing on the Panasonic is very directional in nature. When I am in my normal seat directly in front of the TV, I can hear it. If I mover just 3ft left or right of center (same distance), it disappears.

Same here. A lot of the time it doesn't bother me because I'm not directly in front of the TV, sitting in the middle of my couch. If I am sitting at either end of the couch I can hear the buzz just barely, and if I'm lying down reading or looking at my phone, it's completely silent.
post #60 of 221
One other thing. For the most part, I only notice the buzzing when the volume is low and there is no other ambient sound in the room. If there is any ambient sound at all I really don't notice it.
Edited by rmallen - 12/16/12 at 2:58pm
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