To
SD, bnt and other esteemed PPRuNers waiting with bated breath for the next exciting instalment of the 'None of the above Patented Difference Engine' problem.
I changed the main board battery a few days ago and the system has been stable since then. Having been foolhardy enough to make that statement, something will go wrong.
The battery was £2.99 from the local motor spares shop and, at the time of writing, a better bargain than a new main board.
Thanks, chaps.
N o t a