dante: It's not an easy thing to try and troubleshoot problems with any electronic equipment unless you have a Service Manual/Schematic and general knowledge of the unit internally. You are very limited in solving any problems from a user's stand point of view. Out of curiosity, are you using the functions on the actual TV or remote control? If it's by the remote control, you could 1st try replacing the batteries or taking the remote unit apart and cleaning the keypads on the circuit board with isopropyl alcohol and a tooth brush. If on the TV, it would require extensive disassembly to get to the buttons. That's probably why no one Online has been able to help you. As to the PIP moving up and down, I have no information that I can give you now as to what to check.