la esegui dal computerino ed é banale :procedura di recovery "RD protection reset"?
In cosa consiste?
dal manuale shimano
In order to protect the system from falls etc., if the bicycle is subjected to a strong impact, the RD Protection function
will operate and the connection between the motor and the link will be momentarily severed so that the rear derailleur
can no longer operate. Executing RD Protection Reset restores the connection between the motor and the link, as well as
the function of the rear derailleur
https://www.manualslib.com/manual/1177600/Shimano-Steps-E8000-Series.html?page=48
ciao