Charge 3 display went blank

[Kelt76]

My Charge 3 was already performing poorly (very dim display in sunlight AND evening) but then I went to Settings to check the Brightness, and the display went blank. It will not return, despite depressing the home button on the side or tapping it. 

Moderator edit: updated subject for clarity

[EdsonFitbit]

Welcome to the Fitbit Community, @Kelt76.

I'm sorry to hear about the difficulties you experienced with your Fitbit Charge 3. Thank you for trying to get them resolved before contacting us.

Please restart your Tracker by following these instructions. In addition you can perform a long restart:

1. Connect the device to the charging cable. 
2. While the device is plugged into the charging cable, press and hold the button down for 15 seconds. 
3. The device turns on and shows a battery icon. Two vibrations occur: first a short vibration, then a medium vibration. 
4. The device turns off.
5. The device turns on and shows a progress bar and short vibrations occur. The progress bar completes. Note: A total of 7 short vibrations occur. 
6. Remove the device from the charging cable. The device shuts down.
7. Important: Plug the device into the charging cable again. 

If the instructions shared above don't work and your Tracker vibrates when the side button is pressed, please try to change the clock face:

• From the Today tab in the Fitbit app, tap your profile picture > Charge 3
  tile.
• Tap Clock Faces.
• Browse the available clock faces. Tap a clock face to see a detailed view.
• Tap Install to add the clock face to Charge 3.

Hope this helps.