How to make the Sony TV start-up on AV4

[PeterD]

Hi - I have just updated my Sky+ box to a Sky+HD box and connected my satellite input to the HDMI input.

The satellite channel is AV4, the freeview channel - AV2. Whenever I switch on the Sony TV (KDL-26S2010) - it starts up on AV2. So I need the Sony remote to move to AV4 everytime to watch Sky - ie I need 2 remotes at all times. Does anyone know how to make the Sony TV start-up on AV4, please??

Thanks

Peter Dawson

Edit: changed header to reflect query