Richard,

The rather trite answer is, return the system to Lenz USA, however I add the suggestion to purchase a Roco MultiMaus as a back-up system which will seamlessly function with your Lenz.

Five years ago, I had a similar experience and, in desperation, did what I advise. The MultiMaus now has become my de facto system whilst the repaired Lenz is merely the back-up. BTW, I was not appraised of the failure of the Lenz and I never bothered to ask.

Agreed, the MultiMaus has shortcomings in terms of programming but I actually found it easier and the lack of the ability to 'read' CV values proved to be nothing more than 'so what'?

Tim