Vizio GV42l buzzing

Take you tv to a tv shop

First turn the volume all the up on the box, if that does not fix it you need new speakers.

It ur Vizio tv,The power supply board is the problems.The transformers in the power supply board have gaps in the transformers.The high voltage curents flow that make that buzzing noise.

I bought the same TV for my Mother last Christmas. She is having the very same problem. If you have come up with a solution, please let me know.

try to unplug some cables from the T.V like PS3/PS2/Xbox ect, or check your VCRs or DVD players cables by taking them off to see if the noise goes away. My crappy t.v makes a buzzing noise when i connect external speaker or VCRs or my PS3

Check the cables because this sound comes when the polarity of wires interreact with each other.

The audio board on your 47" Vizio has gone bad. Replace that board will fix the problem.

my tv is new too and also makes a buzzing sound and i turned the DCR off and it worked to thanks for the help!!

The TV usually hums when the backlight setting is too low. So turning it up should get rid of the problem. To do this please follow these instructions:

1. Turn the TV on.
2. Press the Menu button on the remote, located right below the channel changing button.
3. Press the down direction button, located at the middle of the remote. Press that button until the backlight is highlighted.
4. Press the right direction button until the backlight is at 100.
5. Press the OK button and then the Exit button until you get back to your picture.

Sounds like a power supply, could be a large capacitor or a large transformer making the noise