If you havent heard, several early Nintendo Switch adopters have been having issues with connectivity of the left Joy-Con controller while the right side had no apparent issues. During this time, enthusiasts have been performing a DIY repair that involved opening the Joy-Con and adding wire to the Bluetooth antenna, improving connectivity and eliminating the issue for the most part.
Further investigation of the connectivity problem has led Nintendo to issue a fix. Unfortunately, for those of you expecting it to be addressed in a firmware update: this is a hardware issue. Thankfully, Nintendo will be repairing Joy-Cons for those of you experiencing the left Joy-Con desync issue.
CNET has documented a Joy-Con with before-and-after photos of Nintendos repair, which turns out to be a really simple fix. An antenna shield is needed right where the Bluetooth signal is emitted from, lack of this shield was causing the Joy-Con to be more susceptible to radio interference. You can refer to the little black foam square on the repaired image.
Nintendo was offering folks really quick repairs for the left Joy-Con with next-day shipping in both directions. However, since, more of you will contact Nintendo for the same issue, Nintendo will offer the free repair with up to a one-week turnaround time.
Nintendo officially said the problem was a “manufacturing variance” that affected a batch of units. If you’re interested in the grimy details of the investigation, head to the “Source” link below.
Source | Via