I even used a new fast charger and a number of 5V/2A blocks thinking the original one was toast. This only started happening suddenly after an update, and I've

I even used a new fast charger and a number of 5V/2A blocks thinking the original one was toast. This only started happening suddenly after an update, and I've never been able to charge it unless shut off ever since. Even the "plugged in" graphic doesn't show, and it will not even try to charge when plugged in to sync. I read about the voltage/amperage thing before, but it doesn't seem to be the case here. It is a sensible solution that I wished would work, but isn't working on mine. Of course, it is possible that the charging circuit inside is worn down or something. But again, it started happening immediately after an update, and no subsequent update fixed it. And now it is unsupported, so it is what it is until it officially croaks.