Charge 3 display is black

[Fennecgreen]

I’ve had this charge 3 for a very long time I think 2 years but at the start of the first lockdown it was fine but then I couldn’t find it for about 4 months turns out it was at the back of my cupboard and then it wouldn’t work it won’t connect to my phone and the display is black but when I hold the die button it vibrates that’s all it does I’ve seen a few things where holding down the button 8 seconds while in charge resets it but that didn’t work also I can’t change the face because it won’t connect 

any help

thank you

Moderator edit: subject for clarity

[WilsonFitbit]

Hello @Fennecgreen. Welcome to the community forums!

Thank you for the information and for the troubleshooting steps you've followed prior to posting. For the screen inconvenience, I've recommend reviewing this thread for tips and suggestions on how to help with screen inconveniences. 

If the inconvenience with the screen is resolved, I recommend reviewing the following help articles for the setup and syncing issue: Why can't I set up my Fitbit device? Why won't my Fitbit device sync? And How do I change the clock face on my Fitbit device?

Hope this helps.