can't force restart
Cant force restart
sill showing the exclamation mark and the apple help website
Apple Watch
Hi Marc
As you have already tried force restarting your watch, you will need to contact Apple Support (mail-in service may be available) or make a Genius Bar reservation with a view to having your watch serviced under warranty:
https://www.apple.com/support/watch/contact/
"If you see .. a red exclamation mark during startup, and your Apple Watch appears to restart or never fully starts up, contact Apple Support"
If your Apple Watch doesn't respond or won't turn on - Apple Support