Hello,

My comment comes a bit late. Anyway, in case it could be helpful to someone:

My Fenix3 was not responding. After a loooong wake up and then analysis process, i found that the START/STOP switch was dead.

I ordered a mother board (+ i took the opportunity to change also the battery). It took almost 3 weeks to be delivered so I couldn't wait and i purchased a Fenix7X. But for 42US$, I could fix my Fenix3 that is now working as it used to work on its first day.

So, if you get your Fenix3 (or other model?) definitely stuck, don’t throw it away. Just change the motherboard and you’ll get a brand new healthy watch.