How to save my Applewatch？

[Darcie]

After my Iwatch update to version 4.3, the boot has been black, showing apple icon only, but it can't boot. What should I do?

 

[iPhysicist]

This is a known bug. First you should press crown and button simultaneously until it restarts and then if it doesn’t get past the boot screen repeat process. It will eventually boot at some point. Putting it on the charger over night may also be an option. It worked for me twice.