Vizio GV47LF
*Update 10/6/2008* I’ve determined that buzz only happens when the dynamic backlight has the AI setting turned on. This mode can be found in the GV47LF’s advanced picture settings in the menu system. This is a shame because I think the AI settings delivers the best picture in terms of brightness and vivid colors without being too bright. I now have the dynamic backlight set to On instead (There are three settings for the dynamic backlight: Off, On, and AI). The screen becomes too dark for my taste with the dynamic backlight turned off. I suggest setting the dynamic backlight to On and setting your brightness to around 50.

My GV47LF has developed a buzz. I think it’s the backlight buzz I read about on the AVS forums. It sounds like old refrigerator. It gets louder when there is a lot of black on the screen. The television did not do this when I purchased it. It started buzzing 5 months after I bought it. It’s not loud enough to make the television unusable, but it’s distracting nevertheless, more so because it’s not a constant sound, but rises and falls with the black levels.