Hello, TV has a cracking sound from the speakers, sound from the headphone jack is ok.
with new speakers the sound is just as bad.

UE55D6200
BN44-00457A Power Board
BN41-01587E Mainboard

What exactly can I check, what could be the cause?
How do I repair the error?

I can't find a circuit diagram on the internet

thanks greetings from austria

[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"power.jpg","data-attachmentid":3325115}[/ATTACH]...