Cheers, I checked the fuses the other day and they were O.K.. I'll have a look at the connectors tonight, is it mounted next to the jack?

I've it tried disconnecting the battery again a few times and still no joy, any other ideas? Other common issues?

I disconnected my battery at the weekend, when i reconnected it there was no sound at all from the radio, tape or CD but the screen functions still work (i have the wide screen sat nav unit). Is my best plan of action to disconect the battery again or is it likely that i have disturbed some thing ...