I did an update today & my screen went black! At first I thought it was part of the update but it's been hours. I thought well maybe the battery died (it was at 67% when I started updating). So I put it on the charger and still can get the screen to come on. I opened the app on my phone it says my watch is 97%. I can turn the watch off & on at least according to y my phone app! But no matter what I do my screen is black! Please help!