Left joycon isn’t recognising it’s on the switch

[fickle solar]

When I slide my left joycon down onto my switch it doesn’t connect and just stays as a wireless controller. Right joycon works works perfectly

[quick cliff]

Do you happen to have another joycon on the left side to test?

[fickle solar]

Unfortunately not

[quick cliff]

Alright then process the read the tag below

[sacred sorrel]

rail

FIX HANDHELD JOY-CON DISCONNECTING ISSUE

• Basic Troubleshooting
･ Make sure the Joy-Con is on by observing the LED lights on the rail.
･ After that, slide it into the Switch.
･ If there is a response on the screen, or a click sound, it means the rail is still working.
･ Go through Nintendo's trouble-shooting guide.
･ Remove all controllers pairing using this procedure.
･ Process to the cleaning instructions below if your Joy-con still have issue.

👉 Click here for cleaning instructions

§ If cleaning didn't work, you may need to repair the rail.

• DIY guides:
･ Tablet's right rail
･ Tablet's left rail (Very hard)
･ Joy-con's left rail
･ Joy-con's right rail is similar to the above.
･ Rail's button flex board: Left & Right

• Parts:
･ Console's slider rails
･ Joycon's slider rail
･ Joycon's rail's buttons flex board

Requested by BladeSpringSun#4133

[quick cliff]

Use the cleaning instructions

If after cleaning it still doesn't work then it may need to be repaired.

Can you test if the SL/SR buttons are still working?

Go to System Settings > Controllers and Sensors > Input test and click on SL/SR buttons on the rail

[fickle solar]

Yes these buttons are working

I’ll try cleaning it now only I don’t have the alcohol so I’ll just use a dry brush

[quick cliff]

I see, then the rail's board is still intact

[fickle solar]

I figured out that I have to slowly push the joycon down the rail until it makes the click noise but it’s a couple of milimeters above from where it’s supposed to be

[quick cliff]

Eh isn't that normal?
The click noise is from the locking mechanism.

Can you check if your locks are worn out or not?

[sacred sorrel]

lock

JOY-CON LOCK REPLACEMENT

§ The Joy-con is attached to the Switch's rail via a locking mechanism (locks). Since it's made of plastic, it will wear out through usage, leading to loose attachment and even Joy-con disconnection. You can replace it by yourself or through a repair service.

[👉 Click here for Repair Service Guide](#986637761916317707 message)
※ Note: This might fall into the free Joy-con repair. Ask Nintendo's customer support for confirmation.

• Due to the modular nature of the Joy-con, it's normal to have a degree of "play" movement on the rail, even when they are brand new.
• Using a thin piece of paper/cardboard between the rails can force a stiffer attachment, but it might lead to faster wear on the locks.
• You can reduce the wear of the locks by pressing the lock button on the Joy-con deeply every time you pull it out as well as when you slide it on.

■ DIY Repair
There are 2 options to choose from: Plastic locks similar to the original ones or metal locks that are more durable.
･ Metal locks with screwdriver - Amazon US
･ Plastic & Metal locks - eBay listing

■ Video guide: How to replace Joy-con's lock

※ Image below: Left joy-con with worn out lock, right joy-con with new lock.

Requested by BladeSpringSun#4133

[fickle solar]

No I mean the click animation that comes up the actual switch screen

I’ll check it now

The locks look fine to me

[quick cliff]

eh, that's a software confirmation that the joycon are connected

So basically, for some reason, your joycon wasn't "engaged" correctly into the tablet

[sand vessel]

Let the joy con sit on the switch for a da

A day