Ran DFU programmer and got libusb0.dll error
Fixed that (I assume) as the next run gave a ‘no device’ error

Checked lead by taking the A - A lead and connected a A socket to type B - then plugging A side into PC and the B into some device. Nothing.

Used a normal A - B lead and the device came up on the computer - so suspect the A - A lead I have is a dud

Got an A - A (not transfer lead) on order