Galaxy watch 4 classic not turning on (black screen)

I have a 46mm galaxy watch 4 classic that is completely unresponsive with a black screen. The watch has no water damage, I took it apart just to check that. I've tried holding both buttons down to no avail. I'm running out of ideas on what it might be.

I don't have much of a back story on it, a friend gave it to me and said it quit working one night. He didn't know if it updated before it quit. it was not boot looping before it quit.

Anybody got any ideas on what it might be?

Update:

I bought another Galaxy watch on eBay for parts to potentially put two together to make one good one. Unfortunately in the eBay listing it was labeled as boot looping but now that I have that it happened but it has not shown any life since I've had it, so back to square one... At least it was only $20 lol

I did take it apart as well just to check for water damage and it was spotless so more than like more than likely the same issue as my other one..... Nice