I had this same thing happen to me on 7/23/2022; device w/only show Fitbit logo. After running through all the fixes suggested by Fitbit and online, I called Fitbit's Customer Service. After about a half hour on the phone running through the same suggested fixes with the Customer Svc Rep, he said I would probably have to replace the device. I was sent a 33% off coupon by Fitbit to buy another one. I just bought this in 04/2021! I'm doing more research before I buy another device from Fitbit.