This is quite an amusing Forum.
I'm pleased with the comment about being as tight as two coats of paint. As a Yorkshireman, I appreciate that.
You guys need to remember that you'd be out of a job if it had not been for two Scotsmen fighting over a penny and pulling it so hard they invented copper wire.
Yorkshiremen are even tighter.
I have now linked out all the zones and there's still the same fault, so it's either the 9448ES main panel or the 9427 remote keypad.
Having looked on ebay at the prices of new replacements, it's not worth faffing about. I'm going to replace them with something better.
Many thanks for your help and amusing comments.
