LG 32LG3000 Sound Problem

[gordonpt]

Hi, I've a LG 32LG3000 with a sound problem, the sound starts vibrate and make a lot of noise after some time, like 30 minutes. especially if the sound is low, like less than 10.

Have you experiencing this problem before?
I'll open TV this weekend to see if there is any suspicious component, like a bad capacitor.

Thanks in advance,
BR