If you have sync issues, you likely need to replace a failed capacitor inside the controller. If this is happening to your controller, you may find it hard to accept, but I had two guitars that would not sync and I fixed both of them the with same repair. Replacing a 220uF@10v capacitor shown in this video did the trick and now they sync first time with no fuse. Go ahead and view this video for detailed instructions, but please be ready to hit pause or rewind in order to read all my detailed notes as there is no audio. In summary, Its not that big of job, email me at [email protected] if you have questions or if you want to share your success story.