Hello Ralf,

It is unusual for modules to just stop except for the obvious - dead battery. Even if you have changed the battery it is worth trying another that you know to be OK. If nothing happens then try taking the battery out and putting it back two or three times. If nothing happens leave battery in and try setting the module up by pushing in the inset button not the external pushers.

If nothing happens then it is likely to be a loose connection which is difficult to check out without seeing the module.

The biggest problems with these modules is parts of the numbers not lighting up - very unusual for a working module to just stop if not a battery problem.

Hope this helps, Jack