It may be that the panel buttons are connecting somehow, or that the internal board could be the issue. I can't suggest one way or another without inspecting it, but it may be a simple repair. I might suggest having a technician look at it and give you a better idea.
I have a SAMSUNG Slimg SLP TV (BP68-00633A). Ive had it for approximately 2 years. AS of yesterday, the input channels are changing on their own. I had multiple gaming systems hooked up to the tv. When watching cable, it would go to AV1 back to Cable again, and sometimes cycling through all very fast. To get it to stop, I had to unplug all systems, but it still shows an error message when attempting to change "No input devices connected." It isn't the remotes because I tried removing the batteried in case they were malfunctioning. Is this something that can be repaired or is it time for a new television? Thank you.