Hi Old_Bison,
Thanks for posting in Apple Support Communities.
With your Apple Watch not powering on to show anything on the display, make sure that your Apple Watch has been charged with an Apple certified charger or the cable that came with your watch. Perform a force restart to try to get Apple Watch to respond.
To force restart your Apple Watch, press and hold both the side button and Digital Crown for at least 10 seconds, then release both buttons when you see the Apple logo.
Restart your Apple Watch - Apple Support
Contact Apple Support for service options or find a nearby location to take your watch.
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Regards.