So any time you have a video signal coming in to your 990, the remote control effectively ceases to work. And I'm assuming that you are not using any sort of IR system that ties into one of the rear IR inputs - that you are just beaming signals to the front sensor. I can't explain why it is behaving this way, but it is not inherent to the 990's design - may be an odd defect in your unit... I suspect that the Outlaws will get you sorted out.