Watch touch screen issues
My touch screen isn’t working. Can someone help me figure out how to fix this?
Apple Watch Series 4, watchOS 7
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Is it charged?
If your Apple Watch won't charge or it won't turn on - Apple Support
If so, at this point your best bet, if possible, is to make an appointment at the Genius Bar in an Apple Store near you and let them look at it.
Genius Bar Reservation and Apple Support Options - Apple