No blinking LEDs at all. I phoned customer support and after going through their troubleshoot list and restarting the surge, changing settings and re syncing the LEDs still failed, so it's been marked as defective and am getting a replacement from Amazon tomorrow. Annoying, but I literally tried everything suggested by both the operator and on the Fitbit website and still no result in terms of the tracker working. Thanks for your reply! Thought I was doing something wrong but turns out the tracker is defective. Hoping the new replacement works well 🙂