my Apple Watch screen will not turn on and wont respond to restart

Have you made sure it's charged completely up? And double checked that the charging wand isn't bad?

Are you using the original charger that came with your Apple Watch? If not, try using that.

Try force restarting it by holding in both the crown and power button together until you see the apple logo.

See this article for more steps:

If your Apple Watch won't charge or it won't turn on - Apple Support