I had a recurrent fault identical with that of EGPH.
Without any technical justification whatsoever ( just bl**dy annoyed) I pulled out the battery pack for a second whilst it was mains connected,then clicked it back in again. Hey presto! It woke up and subsequently initiated every time since with this treatment until it was stolen -thus ending my involvement with the situation and providing a South African solution to the problem.
Tried that doesn’t help this time :confused: