My right joy-con is not being recognized as connected into the switch.

I had the same issue after replacing the joystick. Turned out the bottom ribbon cable of the rail was not properly connected. Hope this helps!

If I'm understanding you correctly, The joy con is connecting physically, but the switch isn't recognizing that it's connected?

https://en-americas-support.nintendo.com...

Nintendo recommends making sure your system has all updates to fix any firmware issues.

Then, try power cycling the switch, detach the joy con, reset the joy-con’s connection by pressing the Sync button and then a button on the controller. You should be able to attach it and the Switch recognize it. If it continues to happen, just the right joy-con would have to go in for servicing. The above link has the info for Nintendo repair services if you need it.

I put a couple layers of painter tape on the switch side corner where the joycon slides down. These layers of tape pushed the controller outward helping the contact ribbons connect. try this!

It fixed my right controller not fully connecting.

Hi, I had this problem with my left Joy-Con. I was playing FIFA 20 and the switch didn’t register the joy con physically connected. When I slid it in, It wanted me to press ZL on the joy con. I did that and nothing happened. I then restarted my Switch, slid in the joy con and the switch seemed to register it.

I tried all these, none worked. My joy con worked wirelessly, but not when connected to switch. Discovered the problem was not the joy con but on the switch where the joy con slides in. At the bottom of slide there is a hole and if you shine a light in there you can see the metal connectors. I just put a tiny flathead screwdriver in there covered with a soft cloth and gently cleaned it out. Put the joy con back on and this time it made the click noise and was working again.

The metal connection rail on the Switch can go faulty as well as the associated rail on the joycon. I think detection is made via NFC. If a known-good joycon does not detect then replacing the rail on the Switch can solve the problem.

I tried this and I found that the aerial inside the right joy con had unplugged its self, when you open the right joy con directly below the battery you will see a piece of wire that goes round part of the battery, at one end of this piece of wire there is a round gold plug that actually plugs into the board you can just push it on with a screw driver and it will be fixed, it usually un plugs when you change the thumb stick and people don’t realise

There are pins on the bottom of the rail that slides into the console and corresponding pins on the console itself. I am fairly certain that the console uses that connection to detect whether the joycon is attached. The rail and pins are part of the underside cover assembly. That assembly is connected to the rest of the controller by two ribbon cables. As suggested above, the lower ribbon cable goes to those pins. So, if there are no other problems with the joycon, it should just be a matter of reseating the ribbon cable correctly. However, if you, say, made a mistake like I did and didn't realize the connector was a ZIF connector and pulled the cable out without releasing it and damaged the connector, well, uh, sorry, I think it is new joycon time (unless you have the soldering skills needed to replace the ZIF connector).

I had this problem and was able to fix it by opening up the joycon. I noticed that there was a thin small black square, on edge, next to the battery that seemed out of place (NFC perhaps?). This may have happened when I opened it up but I repositioned it back anyway. I also took some rubbing alcohol and cleaned both rail contacts on the joy con and switch (I had use a piece of paper towel and toothpick to clean the console contact). Put it all back together and now it works.

I just purchased a Nintendo switch the right joy-con will not connect will not charge and is not recognized by the console. It worked when I first bought it only for a while I let it charge all night long and now it will not even turn on. I have tried disconnecting reconnecting disconnecting reconnecting from the console. I have tried pressing the button to reconnect the joy-con to the system. I can't even get a green light to come on on the joy-con. Please help

I had the exact same issue (made a thread about it). If the joycon doesn't detect that it's directly attached to the Switch, it's almost certainly a problem with the bottom ribbon cable that connects the rail to the motherboard. From what I understand, this bottom ribbon cable controls the physical connection between the joycon and the Switch itself, and is used for charging, syncing, etc.

In my case, I had a bent pin in the connector that the ribbon cable goes into. Bending it into place solved the problem.

Make sure to check that there is no tears or breaks in the joy-con rail cable. This happened to me with a left joy-con because I squeezed too hard and ripped it a tiny bit.