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Panasonic Plasma buzz and noise.

post #1 of 12
Thread Starter 
Hello all,

I have a couple weeks old Panasonic P60UT50, and I have a couple questions I'd like opinions on.

First and most important, buzzing. I know plasmas have a tenancy to buzz, but what is acceptable? On bright/light colored screens, I can hear the tv buzzing from my bed (~12ft), on mute or even low volume. If I'm sitting closer, it's even easier to hear. Is there anything I can do to help this? Does this get better with time, or worse? I'm thinking of exchanging it just to see if another set is better at all.

Second, picture noise. I noticed this in another Panasonic I had for a short time last year as well. To be fair, I really only notice it when I'm within ~5ft of the tv, on mostly dark areas. Especially in dark games for instance. It's a sort of moving noise in the picture. Is this a normal thing for plasmas? Specifically Panasonics?

Other than that, I do love the picture on this tv. Glare is a little distracting at times, and short-term quick-IR can be an issue. I also noticed some line bleeding a few times that was distracting. But it IS pretty. biggrin.gif
post #2 of 12
I just got a 60GT50 last week and noticed buzzing for the first time two days ago, while the set was on mute. I noticed it on very light scenes. Am I concerned or bothered by it?--No! If it wasn't on mute, I never would have noticed, and it wasn't so loud that it was annoying. I don't know anything about picture noise you describe, but I also don't know why you would want to sit only 5ft from the set.
post #3 of 12
the buzzing should stop after a while and when the tv gets warmed up when i frist got my st50 i hread the buzzing when i ran slides on birght slides
but it went away. now close to 2,000 hours sometimes it buzzs but it goes away i site around 50 to six away from my 50 inch
post #4 of 12
C
I went through 4 65vt50s until I got one that was acceptable. The first three all built prior to July 2012 had buzzing one of them severe. At first I didn't believe others who said that theirs did not buzz at all until the 4th (october 2012 build date) which is nearly silent even on the white break in slides.
post #5 of 12
Thread Starter 
Quote:
Originally Posted by Rschissler View Post

I just got a 60GT50 last week and noticed buzzing for the first time two days ago, while the set was on mute. I noticed it on very light scenes. Am I concerned or bothered by it?--No! If it wasn't on mute, I never would have noticed, and it wasn't so loud that it was annoying. I don't know anything about picture noise you describe, but I also don't know why you would want to sit only 5ft from the set.

Sounds like it's good for you. For me, I noticed almost immediately. Of course, if I have my Polks going anything significant I don't notice; but sometimes, I keep something going fairly quietly. That's when it annoys me.
As for noise, well my chair in front of my bed that I use to view the tv half the time is only ~5ft from the tv. While sitting back I only notice the noise a little; when leaning forward I notice more. I know it's a bit close for ~5ft viewing, but I have to compromise with a 5ft - 15ft viewing difference. I like to compromise on the larger end of the scale.
post #6 of 12
Thread Starter 
Quote:
Originally Posted by tazz3 View Post

the buzzing should stop after a while and when the tv gets warmed up when i frist got my st50 i hread the buzzing when i ran slides on birght slides
but it went away. now close to 2,000 hours sometimes it buzzs but it goes away i site around 50 to six away from my 50 inch

Interesting. Haven't noticed a change when it warms up. Gonna do more testing on that.
Probably will do an exchange while I can though. Especially with Best Buy's extended holiday exchanges right now.
post #7 of 12
Thread Starter 
Quote:
Originally Posted by cmay91472 View Post

C
I went through 4 65vt50s until I got one that was acceptable. The first three all built prior to July 2012 had buzzing one of them severe. At first I didn't believe others who said that theirs did not buzz at all until the 4th (october 2012 build date) which is nearly silent even on the white break in slides.

Interesting to know! Mine is a July '12. I wouldn't call it severe buzzing, but I think I'm going to try another set. When on a white slide, with a good brightness, how strong is the buzz in a quiet room? How far do you have to be to not hear it?
Thanks for the info!

And that is a lot of exchanges, lol. Online or in-store?
post #8 of 12
Quote:
Originally Posted by cmay91472 View Post

C
I went through 4 65vt50s until I got one that was acceptable. The first three all built prior to July 2012 had buzzing one of them severe. At first I didn't believe others who said that theirs did not buzz at all until the 4th (october 2012 build date) which is nearly silent even on the white break in slides.

That's fascinating. Makes me wonder if there wasn't some manufacturing change. Although, if true, you'd think there could be a fix put out for existing units.

I'd be delighted if I could make mine silent, even though the noise only becomes audible in rare circumstances.
post #9 of 12
Quote:
Originally Posted by mattrg View Post

Interesting to know! Mine is a July '12. I wouldn't call it severe buzzing, but I think I'm going to try another set. When on a white slide, with a good brightness, how strong is the buzz in a quiet room? How far do you have to be to not hear it?
Thanks for the info!
And that is a lot of exchanges, lol. Online or in-store?

I judged the basis of how severe on the sets i had by if you can hear it while having volume at your normal listening levels. Of course normal listening levels will vary by individual. On the defective ones, the buzz drowned out dialogue at low levels. The buzz could be heard from 10+ feet away. Exchanges were made with in-store. 3rd set was a blessing as i went to BB and they price matched the lowest current online which was very low and had no problems exchanging with BB for the 4th and ultimately the set I am finally satisfied with.
post #10 of 12
Quote:
Originally Posted by mattrg View Post

Hello all,
I have a couple weeks old Panasonic P60UT50, and I have a couple questions I'd like opinions on.
First and most important, buzzing. I know plasmas have a tenancy to buzz, but what is acceptable? On bright/light colored screens, I can hear the tv buzzing from my bed (~12ft), on mute or even low volume. If I'm sitting closer, it's even easier to hear. Is there anything I can do to help this? Does this get better with time, or worse? I'm thinking of exchanging it just to see if another set is better at all.
Second, picture noise. I noticed this in another Panasonic I had for a short time last year as well. To be fair, I really only notice it when I'm within ~5ft of the tv, on mostly dark areas. Especially in dark games for instance. It's a sort of moving noise in the picture. Is this a normal thing for plasmas? Specifically Panasonics?
Other than that, I do love the picture on this tv. Glare is a little distracting at times, and short-term quick-IR can be an issue. I also noticed some line bleeding a few times that was distracting. But it IS pretty. biggrin.gif

My 58" Samsung 7000 Plasma 2 years ago did it so bad I had to return it....quiet scenes from 15' away, it's all you heard, drive you crazy. The 50 VT Panasonic Plasma had a MUCH lesser buzz I could live with. Pretty certain ALL Plasma's do this, you can really hear it emitting from the rear, usually around the middle toward the side, thing it's the power supply.

Got a 55" ST50 Panasonic Plasma yesterday, it buzzes, but you really only hear it if you have a silent room, and are right in front of it, and it's still faint.....nothing like that dreaded Samsung.

If you put the center of the screen above eye level, it should go right over your head, but this is hardly ideal in most cases.


As for the video noise, it's in dark scenes, like a fuzzy gradient shift....I noticed this too, seems to also be on all plasma's....I was hoping it would be my 10GB Blu-ray rip being too compressed, instead of an actual issue with the TV, but I have yet to test a retail blu-ray for direct comparison. My guess is, it's the TV being that I noticed it on the other Plasma's.....but the picture overall is so good, I will probably just forgive it.
post #11 of 12
Quote:
Originally Posted by rogo View Post

That's fascinating. Makes me wonder if there wasn't some manufacturing change. Although, if true, you'd think there could be a fix put out for existing units.
I'd be delighted if I could make mine silent, even though the noise only becomes audible in rare circumstances.

As silly as it may seem, One of the fixes they must have implemented was using different screws on the inside as the Panasonic concierge on the phone told me one fix for the older vt50s was to have a technician come out and change out screws as this was one source of buzzing, even just tightening the outer screws may eliminate some f the buzz I was told as well, lastly changing out the board being the most extreme fix.
post #12 of 12
I only notice a buzz on my 58V10 when the screen shows white. It's noticeable, but it's not too bad and doesn't bother much at this point. My girlfriend still claims she can't hear the buzz, though. Maybe I've just been listening for it.
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