Originally Posted by cajieboy
I'd put in the slide-show (w/USB Thumbdrive) on continuous for about 200-300 hours non-stop. After that, see if the buzzing has subsided. If not, you have a problem with this TV. Loud buzzing is not a normal function for this TV. Either have it repaired under the Mfg'er Warranty, or return it. I have a 60ST60, and have never heard the buzzing.
Originally Posted by jkasanic
I'll just reiterate my findings with the plasmas I've owned for those that have never owned one (60ST60 and Pioneer 6010). They both buzz and if I survey 10 friends then some say it's terrible and others say they can't even hear it! The point being that people who say plasmas don't buzz at all simply can't hear it and if you find it objectionable then there's a good chance that your hearing is susceptible to the buzz frequency and a slight slim chance the set is faulty (ie unless everyone can hear the buzz regardless of content during normal viewing!). Typically, I find the buzz most annoying while fast forwarding thru commercials on my DVR. The rapidly changing screen brightness changes the intensity of the buzz frequently which makes it more noticeable (plus the volume is muted). During normal watching, I can still hear a buzz from about 7ft or so but it doesn't affect my enjoyment. As always, YMMV.
I'd add that following this issue since April 2013 when I bought my ST60, I'm unaware that anyone here who complained about buzzing and arranged for a replacement or a service call found satisfaction, while there have always been some who said their sets don't buzz at all, and even some that said a buzzing plasma is not normal. This is consistent with jkasanic's observation about varying perceptions. I went through two 50ST60s and one 50S60 in between, each manufactured in different months, and they all buzzed about the same. They all exhibited buzzing that increased with APL, and as I've said before and jkasanic just described, it tracks the APL very rapidly, so that if I watch with the set muted in a quiet room, I can hear the buzzing come and go just as fast as the picture changes brightness. I have my set as the secondary display on my PC with black wallpaper so nothing is displayed on it by default, and when it's quiet enough, I can even hear a slight elevation of the very faint baseline noise level when I move the mouse over to the TV; that's how sensitive it is to APL.The good news is, while actually watching TV from my normal 7 feet or so, there is usually enough sound output at my normal listening level of -30 to -20 dB to drown out whatever buzzing there is, and it's rare that I hear it. One exception is the hospital scene near the end of Life of Pi.
So, while I was freaked out by the buzzing when I got the ST60, which was my first plasma, it turned out to be a minor problem. Far more significant for me was the rainbow effect, and that was why I tried an S60 and then another ST60, keeping the second ST60. As with buzzing, they all had the RE about the same. That's another thing you either perceive or you don't. Over time, I've learned to live with the rainbows, by reducing and slowing my eye motion and to blink when I do move my focus in images that are susceptible to RE. (This is not phosphor trails, as RE is just as apparent on a paused image as a moving one. RE is more of a quick flash of yellow or green or red as you move your focus from a relatively bright object containing red such as skin tones or white subtitle text to a dark area of the screen, and there has to be a major contrast difference for it to be visible. I never see it during football, for example, or animation like Family Guy.)