As the original poster of this thread, I object to some members who are trying to use it to 'dis' ebikes. If you read the original thread you will see I was asking for advice on what part failed from someone who knew about such things..
I have since discovered its the controller and have bought another one. Sadly only one member responded with something useful.
For the record, I bike 48 kms to work each day and about 350 kms a week all year round. It is simply not possible for a 60 year old to do that without some help. If you don't want an electric bike, then don't buy one.