The power button is replaceable but you could damage your Samsung TV if you don’t know what you’re doing. To remove the power button, unscrew the back of your TV and disconnect the power cables connected to the power button. Check the back side of the power button to see its serial number so you can track down the exact replacement part you will need to get. Once you have a replacement, connect this new power button to the power cables, and re-screw them.