Apple Watch Series 7 has black screen

My Apple Watch Series 7 black screen. Won’t turn on.

I went to the beach today as I often times do. Put on water safe mode then went swimming. I noticed the apple logo show then black. And refused to turn on.

tired charging it for 30 mins or more. It gets hot but doesn’t turn on.

Pressed force reset both buttons and each button separately

did screen taps

side taps

didnt use a hair dryer or bag of rice yet. Not sure if those help. Or the fridge test.

anything else ?

thanks