Okay, so my tv has been making this high pitched noise and its been driving me nuts. it sounds kind of like your ears are ringing and i have very sensitive ears. the warranty just expired (2 days ago) and the noise is horrible. its a 42" Hannspree LCD tv. ive read about something called a whining coil but i wasnt sure. if you guys think you might know what it is than please tell me and if i must i can upload a video to youtube and post a link so you guys can hear it. and also this might help, The sound will change pitch and become louder and quieter when i change the backlight settings