What to do when your audio and video are out of sync
Remote Control Troubleshooting
How to Fix TV Sound Delay & Out of Sync Audio: Easy Guide
Troubleshoot Harmony and your Computer
Chris Coyier on Twitter: "Ufhfhdks this stupid @Logitech Harmony remote won't sync. Stuck at 58% every time. I've tried setting up a half dozen times. Just entirely broken/useless. 😥 https://t.co/qgEDi3kOm8" / Twitter
Logitech Harmony 650 Troubleshooting - iFixit
Harmony Smart Control, Touch, and Ultimate. – Nerd Drivel