Starview 4 Is it Irish + Minor Probs

[Granty]

Just wandering if everybody gets the small problems I am getting with my SV4 or if they could be sorted, basically when I change channel, a lot of the time I get either a black screen or no sound so I have to go off and then back onto the channel once or twice to sort it out, its only a problem when channel flicking

Also as my box was given to me on the cheap I have always wandered if it could be the Irish model, would this still work on N*L England or not also all my standard channels are listed as ITV Ulster and BBC 2 N Ireland etc. I do know where all the various regional channels are but not why the presets are Irish.