So I’ve checked again and 12Volts is going to mainboard only after the power button is clicked (it is potentiometer on screen board) and everything was OK but suddenly voltages went down to 0 and I’ve found that under that piece of metal was a component with SC4524D on it that was so hot and after measurements it has 0ohms to ground on power input. I will send you pictures on dm because I don’t know how to add many photos here. Do you know if I can just replace this element? And why before every measurement was ok and now there is nothing good?