|
Since it happens at each power-up, I would say that your input is set-up for another source.
Example - I set my DVD input (in the settings menu) to the digital coax source #1. When I power up (or when I switch to DVD from another cource), the receiver switches to the #1 coax input.
By re-plugging in the cable you are probably triggering the receiver's auto detect mode, which then changes it to the optical source.
|