Same problem with me. I recently bought a Band Hero bundle, and the Guitar (from GH5) wont sync. Everything blinks, but the dongle and guitar wont match up. Someone who has had this problem, please explain how you solved it. I tried contacting Activision, but its impossible to get a hold of them.
I recently bought my GH5 guitar.... same problem... cant manage to sync it with the dongle... I checked every troubleshooter there is on Internet, all around google.. tried everything, nothing works... I guess I have a defective guitar. Did u manage to somehow fix this problem >>>?????