Samsung TV makes beeping sound? And doesn't turn on

Hey everyone!
I know this not a console repair question but I hope you can still help me!

The tv of a friend does nothing anymore and just makes a high pitch peeping sound. I opend it up to see if I could replace the power supply but it seems like that is integrated to the control board. So I am looking for a component replacement. I have no thermal camera to see what heats up so I was hoping that anyone who is more knowledgeable could point me to the component or a other method to determine the defect.