I'm going to have to make some assumptions here. You only have one Sky Digibox and it is connected to the other TVs with coaxial cable via a socket on the back of the Sky Digibox called 'RF2'. Or rather is WAS.
If my assumption is correct then check that the other TVs are connected from that socket AND that you have reinstated the remote 'Eyes' for the remote TVs that were also connected on those coax's.
If I have made the wrong assumption put a new post on with a complete description of all of your equipment and how everything is connected.
Terry
July 2006