Hi all, I have a Sony kdl40v3000 TV with a RMT-B102P controller. The controller turns the TV on, the mute and volume also works. The other buttons do not. I have viewed the controller through a camera and the LED lights up with all the buttons. I have also opened the controller and it appears to be clean. I’m guessing it may be a faulty TV receiver? If so is it easy to test/swap? Thanks.