I just purchased this TV from Costco for $850 and I'm having the same high pitched whine that others have reported here. It's constant as long as the TV is turned on (goes away a few seconds after turning it off). I have turned off the TV speakers since I use my reciever anyway and that didn't help. I'm planning to use the concierge service that Costco offers to report the problem and see if I can get it fixed.
Other than the whine it seems to be a good TV, my only other complaint is that I prefer matte to glossy screens, but sadly they seem to be a dying breed.
Other than the whine it seems to be a good TV, my only other complaint is that I prefer matte to glossy screens, but sadly they seem to be a dying breed.












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I am happy with everything except that sound. While the volume is above 10 I can't hear the high pitched sound, but anything below 10 and while changing sources or on mute, the sound is deafeningly annoying...sigh...