Charge 3 scrolling between screens and not doing anything

[Mljac]

Screen started out with 2 thick black lines going across it yesterday. Today the Screen was scrolling on its own and now has strange "symbols " on it. I've tried putting it on the charger to reboot but it doesn't do anything when connected.  Any suggestions?

Moderator edit: subject for clarity

[WilsonFitbit]

Hello @Mljac. Welcome to the community forums!

Thank you for the detailed information and for the troubleshooting steps you've tried prior to posting. Please make sure that you were trying to restart your Charge 3 by following the instructions from this help article: How do I restart my Fitbit device?

If that doesn't work, I recommend performing a long restart by following the steps below: 

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.

On the other hand, you can find additional troubleshooting steps here. 

Hope this helps.