Answer to "How do I fix my broken xbox one S sync button?"Plug Controller in USB. 2. Hold Power Button for 10 seconds. 3. Unplug the Power Cord for 10 seconds. 4. Plug Power Cord back in to Xbox. 5. Power On Xbox Press Power Button on Console. 6. Soft Power down Xbox Press Button once. 7. Disconnect USB from Xbox and Controller. 8. Power on Xbox with Controller. You're Welcome. Enjoy! I found this on a different page and it worked!!!!