I had this issue in November too. I finally gave up after speaking with Google tech support. I was told it was probably a hardware failure. Fast forward to yesterday and on a whim I plugged it in. It showed battery charge picture. After it charged it's now operating flawlessly. My guess is their update pegged the brightness setting as low as possible. Even though mine was running fine I checked settings and it was showing as totally dark.
Однажды Они, Вы смогут просмотреть график вашего рейтинга, накопленного за всё время.
Репутация еще не заработана.