Everytime push the volume button, doesn't matter if it is up or down, it changes the input
I have blu ray/dvd and charter digital cable box hooked up to the TV. I had a home theater system hooked up but I took it off thinking it was that but it is still doing it. I use the cable remote to control the TV and box. Even using the remote for the TV to turn up or down the volume and it changes the input.
Televison & Video - Maxent - MX-42HPM20 42 in. Plasma HDTV