Ah, ok, I understand you now!
Definitely sounds like a Sky problem, but the fact it's happened on two boxes is a bit odd!
Best thing to do is have a bit of a play. Things to try, if possible, are:
1. disable the PUC (in connections, just say it's some unknown box rather than Sky) and try it with the Sky remote only - should stop any possible B&O interference.
2. try only the scart or only the hdmi cable connected
3. try it on a different tv