What process do you go through when turning on the panel, Ritz? I think that if you are switching back to control of the CD player (or DVD player) and in doing so "re-select" that input, the 990 stops and re-acquire the signal.

The simplest work-around, which I use sometimes with my MX-700 because most of the device buttons on the MAIN screen double as macros, is to cover the remote's emitter when hopping back and forth between devices. An alternative for MX-500 and MX-700 users is to put a button on the source device's page to turn the TV on (which I also do - every device has a "TV ON" button handy just in case).