Trev
It has to be said I can be a bit of a cowboy..I blame my Dad
he was an electronics tech for southern electric while I'm sure his work was safe. our house needed a little to be desired.he tried to get me into all but due to cronic colour blindness it was a no go.

But as per schofiel post I'll check for dry joints..

Thanks for the advice guys lots to be getting on with.
I might enlist the help of a friend who is a PC techie his colour vision is spot on

Pete