Hello Ken

Sorry about the delay in replying, I had to do some research.
Here are the results of, trying to find any firm who could help.
As you have already stated Lektronix will repair the hardware, i.e. electronics side of things, they repaired one in 2017.

No firm was able to help with the dongle/software problem I have been lumbered with.
I have listed the firms below that have Nee stuff on their websites but cannot help with any software problems.
Cleveland Motion Control
Lincoln electrics of the USA, Germany and the UK.
CR Onsrud have not worked on a Nee controller for 12 years.
Thales in the UK
Burny/ITT

I'm now back to square one, however I'm still going to try the 486 to see if that works.


all the best
Montegoman