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How to Fix Left Joy-Con Sync Issues

What you need

Video Instructions


To reassemble your device, follow these instructions in reverse order.

11 other people completed this guide.

Taylor Dixon

Member since: 06/26/18

67,411 Reputation

94 Guides authored


What thickness of conductive foam should I choose? There are 3 sizes: 3mm/0.12, 5mm/0.20", 10mm/0.39"

maximaleks - Reply

The space is ~9 mm wide, so I would go with the 10 mm size and you can trim it down if you need to!

Taylor Dixon -

I've got the same problem but with the right joycon but I don't know where the wireless card is, please help

Nathan Currie - Reply

Hello I opened up my left joycon and saw conductive foam inside already! I replaced it with one that I bought on amazon (I made sure it was actually conductive foam). But it still won’t sync. Any ideas? Could it be that little solder bubble that connects to the antenna has gone bad? Should I try to reflow it? I also checked to see if any capacitors in the top of the board were shorted and none of them were. If you have any ideas I would be happy to hear!

Chaim Bendahan - Reply

I opened my left Joycon and found that there is no antenna area near the joystick compartment. It’s just an empty space what should I do, I have the conductive foam but obviously don’t know where to place.

Omar Gonzalez - Reply

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