Originally Posted by LinkLight
I signed up here just to went my frustration with the same plastic bezel crackling noises reported in other posts.
It is quite annoying listening for these noises for the first half hour of warm up AND another half hour of cool down
Has anybody tried to minimize these with shims between plastic panels, washers etc ?
I've tried a few shims around the bezel and metal rear cover but this doesn't solve the problem. I suspect the real problem is the metal-to-plastic contact between the inner surface of the plastic bezel and the metal reinforcement brackets that line the perimeter of the inside of the bezel. A solution would probably involve trial-and-error methods and total disassembly of the plasma panel from the bezel in order to locate the areas that rub each other as the plastic bezel warms up.
I've had my 42B450 for two weeks now and love it. I also think that the bezel sounds are fewer and farther between the more hours I get on the TV. It's entirely possible that the plastic bezel is naturally "relaxing" after multiple warm-up/cool-down cycles and that eventually the problem will diminish to nothing. That's the trend I'm noticing, anyway.
My guess is that the problem exists on many 42B450's but that people just don't notice it (e.g. watching tv or game playing with sound turned up). Perhaps some units have more subtle sounds than others depending on the tolerances of the molded bezel. I did read an online review where someone had the this problem on the first TV they bought and so they returned it for a second one and it did not make the sounds.
My 42B450 was built on or after Jan 19, 2010, based on a dated sticker inside the unit. I bought the TV on Feb 9 only two-and-a-half weeks after it was built. The unit is perfect in every way --no pixel defects, nothing. I've thought about returning the TV for the same model but there will probably just be something else on the next unit that isn't "PERFECT" either...
I'm going to monitor the crackling sounds for a few more days and then decide which way to go.UPDATE AND RESOLUTION TO CRACKLING BEZELS PROBLEM 2/25/10:
I decided to buy a second 42B450 to compare the bezel noises to the first one.
My first 42B450 was mfd in Jan 2010 (printed on rear label) and its bezel makes MAJOR crackling noises. Press lightly anywhere in the upper half of the bezel and it emits squeaky, crackling noises as it flexes. Even when I unboxed it the first time it was very obvious just by handling the TV. As we all know, the noises continue as the unit warms up.
Since it appears that not all 42B450s have this issue, I bought a second unit for comparison. Amazingly, the second unit makes absolutely NO sounds whatsoever --the bezel is as solid as a rock just the way it should be. It's like a totally different TV. The mfr date of the second unit is February 2010. HOWEVER, I'm not sure that mfg dates are going to fully isolate the problem. My guess is that the plastic bezel is made for Samsung by a couple of suppliers --one of those suppliers may have built bezels with subpar plastic/reinforcements/tolerances that cause the crackling problem when assembled with the other components of the TV. I doubt there's any way to know when those bezels entered the manufacturing stream or if Samsung has even identified that some bezels are prone to this problem. After reading various forums, I believe the "noisy" bezels were probably used in some late 2009/early 2010 TVs since I didn't really see complaints until the Nov 2009 timeframe. But I'm sure there are other factors, as well.
For certain, I am returning the "crackling" unit and keeping the "noise-free" second one. I think it's pretty much trial-and-error as to which one you get and you won't know until you unbox it the first time. I was lucky to bring home a second unit that was good. To save headaches, the simple test in the store would be to have them open the box so that you can squeeze lightly along the top of the bezel. If it makes ANY sqeaking/creaking sounds at all (a good one will NOT make any sound) just say 'no thanks' and move on to the next box. Very scientific, huh?
My bottom line: The 42B450 is SO GOOD in every respect that I probably would have lived with the noisy bezel problem if the second unit made the same sounds. I'm glad to have found the second unit to be entirely noise-free --again, it was luck-of-the-draw. In my opinion, it's worth the time and hassle to return the TV until you find one that is good (assuming that the noises bother you enough).