It isn't that I was wanting or meaning to "point fingers".
I was only wanting to understand what the problem is.
Alas I am still none the wiser.
The ones I have (well two of them) don't work.
The other two do.
One is my alarm clock and the other one - ether ten - actually isn't "busted".
Going to one of the shops, we tried MULTIPLE boards and they all failed the same way.
Too many to be a coincidence.
Yet, my machine could flash the two I already had.