Fixing Switch’s left Joy-Con desync issue could be as simple as a black piece of foam

If you sent your Joy-Con off for repair, it’s quite possible all it took to fix the connectivity issue with your Switch controller, was a little piece of black foam. I

That’s according to a report from CNET Australia (thanks, Siliconera), which sent its left Joy-Con controller off to Nintendo for a fix.

According to the site, when the Switch controller was sent back, the only difference seen was the addition of a small square of black foam in the bottom right placed on top of the antenna traces.

CNET believes this is a “a piece of conductive foam” treated with either nickel, copper or both which is said to keep electronics from encountering radio-frequency interference. RFI issues can be caused by household items such as microwaves.

The site tested its theory and removed the piece of foam. Connectivity issues started up once more. To further test the theory, CNET purchased another Switch console and found there weren’t any connectivity issues with the left Joy-Con.

Upon taking the housing apart, it was noted the controller didn’t have the same piece of foam as the one sent off for service.

The site figures Nintendo has found a fix for the issue, and that new stock doesn’t have the same connectivity issues. That said, there were many Switch owners who didn’t experience these issues, so until Nintendo comments either way, there’s no way to be 100% sure.

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