How to connect
Open the cover on the back of the Nintendo Switch dock.
Connect the USB plug from the Nintendo Switch AC adapter (model No. HAC-002) into the top terminal of the dock labeled "AC ADAPTER." Connect one end of the HDMI Cable into the bottom terminal labeled "HDMI OUT" on the Nintendo Switch dock.
Connect the AC adapter to a power socket.
Connect the HDMI cable to the TV.
Detach the Joy-Con controllers from the console if you would like to use them while the console is in TV mode.
Align the console with the dock, then push the console down. If the console is sitting properly in the dock, the console screen will turn off.
Turn on the TV and make sure that the input channel is set to the HDMI input. Then, check to see whether the Nintendo Switch screen is being displayed on the TV.