Wonky remote?

[uncle al]

I've got a Toshiba HD TV
I changed the batteries in the remote (yes they are the right way round), but since doing this, the input selector (the circle with the arrow going into it symbol), turns the TV off when pressed. Very frustrating, as I need to use this to select Sky+HD and my other players etc.
But. If I put the small selector switch on the remote to REGZA link (no idea what this does), the input selector works, but you can't change channels.
I'd love to get things back the way they were.
Any suggestions?

[uncle al]

I don't think there's an input selector on the Sky remote
Maybe I wasn't clear, it's the TV remote giving me problems.

[ABerrant]

It is often the case that when you enter the correct code for your TV into the Sky remote the Help button (when in TV mode) acts as source input selector.