Update on this!
Spoke to Deben who are as much use as holed condom!
They say cant do anything as they have no spares or facility to repair.
Finally spoke to Mick Dadd who did give some advice, so thanks to him
Could be battery power, the box needs 'calibrating', dry joint, or good old fashioned dirt!
Have to see where it goes from here.
Will ask my electrical whizz mate again and post his findings.
If he can fix em could be the source for repairs we all need!