You don't say what model you have and as Bush are just an importer their products can vary greatly. However you seem to be doing the right things.
Has the TV ever worked if so what has changed recently? When the search has finished you should have BBC1, BBC2, ITV1, Ch4 all OK and you may get Ch5. Is this the case because anything else is just Regional stuff and can be deleted?
If the above is not the case. By not tuned in properly do you mean that the picture is bad on BBC1, BBC2, ITV1, Ch4?
Are you connecting the Bush TV to the SAME aerial socket as the other TV? If not the socket may be faulty.
Terry
August 2006