I updated my phone and then updated my watch. Watch will not boot after update. Force reboot and apple logo appears for 5 seconds, then screen goes black and nothing else happens. When on the charger, the logo appears for 5 seconds then disappears for 10 seconds then comes back and the cycle repeats.
Apple Watch Series 4, watchOS 7
Is the battery charging normally?
If your Apple Watch won't charge or it won't turn on - Apple Support
Could it be one of these things, either the power reserve or screen curtain option active for instance?
https://www.payetteforward.com/apple-watch-wont-turn-heres-real-fix/
It will not boot. When on the charger, I never get a lightning bolt, the Apple logo just comes on for 5 seconds then goes away for 15 seconds and comes back for 5 seconds and the cycle repeats. I am waiting for the battery to drain and see what happens with a dead battery.
Watch will not boot after update
