my sport 38mm watch will not wake or respond

Hi...

Follow the instructions in this support article > If your Apple Watch doesn't respond or won't turn on - Apple Support

If your Apple Watch turns on, but gets stuck during start up

If you see the Apple logo or a red exclamation mark during startup, and your Apple Watch appears to restart or never fully starts up, contact Apple Support.

Or you can make a reservation in advance at an Apple Store > http://www.apple.com/retail/geniusbar/

You can check your warranty coverage here > https://checkcoverage.apple.com/

How to find the serial number > Find the serial number for your Apple Watch - Apple Support

Hi

Try force restarting your watch: press and hold both the side button and Digital Crown for around 10 seconds, until you see the logo.

If that does not help, next try charging your watch for around 2.5 hours, making sure that you follow the charging instructions here:

Check your battery and charge your Apple Watch - Apple Support

After that time, if it has not already restarted automatically, remove it from the charger and:

- Try restarting it (by pressing and holding the side button until you see the Apple logo).

- If necessary, next try force restarting it again.

More information:

If your Apple Watch doesn't respond or won't turn on - Apple Support