Ace 2 has a black screen

[His1doll]

My son's fitbit ace's screen is black. The watch is charged but I can't get the face to come up. 

This is the third time's it happened. I followed the advice like before but it's simply not showing the clockface.

Moderator edit: subject for clarity 

[LiliyaFitbit]

Hi @His1doll, it's nice to see you again in our Community Forums. 

I am sorry to hear your son's Ace 2 screen is black. Thanks for trying to resolve this, I appreciate the additional details and I am here to help. I recommend trying the following:

1. Restart the tracker by following the steps from this help article: How do I restart my Fitbit device?
2. Change a clock face:  

• With the tracker nearby, from the Fitbit app dashboard, tap the account icon> Ace 2 tile.
• Tap Clock Faces > All Clocks.
• Browse the available clock faces. Tap a clock face to see a detailed view.
• Tap Select to add the clock face to Ace 2. Sync the tracker. 

Let me know how it goes.