Lg 50ps6000

[MOycanooo]

Hi all,

I have got a Lg 50ps6000 that sometimes does a strange noise like a Bippppp very loud that only goes when i turn it off.

It all startes by doing some noises like a BUM every 5minutes and then it goes for the loud bip... that will only stop if i turn it off.

it looks like it comes from the main av board EAX57566201(5)
how can i try to diagnostic more acurate?
and any suggestions on what it might be?

Many thanks.

[Plasmaster]

Hi Mate, are you sure it's coming from AV board? There's no inductors or transformers on it! It must be coming over from PSU, but don't worry about it, your ears must be oversensitive to high frequencies, so are mine