If you have Anynet+ enabled on the TV, loading a disc will cause the TV to select the HT. You can then use the TV remote to control play-back, including menu selection through "Tools". Turning the HT off will revert control back to TV, not another source.
That's how mine works. If yours doesn't, try disconnecting the Sky box. It's known to interfere with Anynet+ type links.
Bit embarrassed to ask but...
I have a Samsung LE 32B650T television connected to a Samsung HT-BD1252 Home Theatre system via an HDMI cable (to port 2 of the TV). Is it possible for the TV to switch to the Blu Ray input when it (the Blu Ray player) is switched on? Further to this, can the TV also automatically switch back to the Sky HD input (connected to the TV via an HDMI cable to port 1 of the TV)?
It is immensely frustrating to have to scroll through the source list to select the correct input and is proving to be quite difficult for my wife and kids to watch DVDs/Blu Rays and/or the TV when I'm not in the house to properly select the right input.
Sorry if this is a very stupid question!