Chosen Solution
They just stopped working with no reason - 100% no liquid damage - no battery corrosion - no dust - battery fully charged - at evening they were working - in the morning not. Strange thing is - EVERY SINGLE key works - just keys from 1 to 9 not (0 key works) I’ve got 3 the same keyboard - other are working - this one not :(
they fixed itself :/ Just battery removed for few days
Not much you can do here as they are sealed tight! Clearly something has gone wrong within it. Time for a new one.
Before you throw this one away, pop the keys off for use on the other keyboards: Apple Wireless Keyboard (A1255) Teardown
