Mine did the same. After digging, I found it was because the charging logic has a bug that fails hard when the battery gets to a certain voltage. The fix, and

Mine did the same. After digging, I found it was because the charging logic has a bug that fails hard when the battery gets to a certain voltage. The fix, and I'm not kidding here, is to remove the battery and plug/unplug it a few dozen times; then put the battery back in and plug it in. Repeat until it works again. I did this for five minutes and it came back to life; I've read of it taking a half hour for some folks.