Originally Posted by Scott Oakley
As you know, I suggested very
strongly in our PM exchange yesterday that you take the time you spend on here and use it to work with your vendor or Panasonic to either repair or replace your current TV. It seems you have chosen not to go that route.
Now, I am calling on my brothers here to join me in suggesting to you again, that you get off of here and use the time to address the perceived problems with your TV.
I hope my brothers on here will join me in this request. It may benefit all of us.
Well Scott you state if the buzz can be heard with volume at normal levels (15-20) and can still be heard than it's a problem. But I don't here it constantly when volume is up and only other time I hear the buzz is if it's a quiet scene. Other than that I can not hear it unless I mute the TV.
What I will do is mute the TV and play a bright scene and here how much it buzzes on the bright scene. For example Pacific Rim when you see the robot rise from the water the light on his chest makes the screen white. On mute you can hear It buzz then goes away after cuz the scene gets darker again. But with volume on you can not hear it at all.
Another member who had his boards replaced and fan fix done, screen did crack but I asked about the board replacement and he said they didn't change anything as far as buzzing it was still the same. He described with slides playing white buzzes loudest, RGB low to mild buzz, and dark slides no buzz at all. Seems pretty normal to me then. Unless TVs before August just like the fan fix done after August have different capacitors on them that don't buzz as much. And since we hae energy limits now they weren't able to use pure performance capacitors since they draw to much power.
So since it can only be heard intermittently and the fans aren't an issue at all to me I never thought they were to begin with, I think the solution is to get some speakers that front fire instead of the stock crappy ZT back panel speakers.
Also what I have described seems to be a lot of people's experiences with the buzz and I've had at least 5 people tell me it's normal compared to just 1(Scott) telling me it's not normal.
The risk just seems to great for something panasonic may not cover if it happens and for the little to no gain that may come from it.
If you guys think it's abnormal this will be my last post (but be truthful about it not just to get me off here). And I will get er done
Post from member to me about his 65ZT60 with 3500 hours on it: he had his boards and fan fix done then screen cracked and ended up with a May model. Describing the same thing I am experiencing to a capital T.
"Not sure that changing the boards out will make much difference. I'm pretty sure I have the exact same buzz that you do. Break-in slides are a perfect way to test this. On the light grey slides, the buzz is clearly audible from 10+ feet away as a high-pitched whine. the darker grey slides are barely audible. Even the bright green and red slides produce a medium buzzing level. When I'm typically watching a movie or TV, the volume level will usually drown out any of the buzzing for me. Only during quiet passages of a film with lots of light output have I ever noticed the buzzing during normal TV watching. I have very good hearing even in the 10kHz+ range so I would say I'm more sensitive to the sound than many other owners. While I'm not happy about the buzz, the overall picture quality makes up for it.
My 2006-vintage Fujitsu 50" plasma barely buzzes at all. If I put a full white field up on the screen I can hear a slight buzz if I put my ears to the screen or back panel - but that's the only way to hear it. The difference is the much beefier power supply and high-quality parts (particularly the capacitors). The Panasonics were built to be as cheap as possible - which is funny considering how they were pushing the whole "studio reference panel" thing. Cheap capacitors are what is causing the buzzing, plus a power supply designed more to meet energy star ratings instead of pure performance.
You could ask for all three boards to be swapped if you are going to have a tech come out (make sure he brings all three boards). Might as well do the fan fix while they are at it too. It is possible that you have an exceptionally loud buzzer on your hands and new boards might make a difference. When I had my boards swapped on the "microfractured" ZT, it made no difference at all.
Now that you know how to check the back panel, there shouldn't be any risk of getting the service done"