How to Connect Nintendo Switch Oled to a TV - tutorial | manual

Open the back cover 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," then connect the other end of the AC adapter to a wall outlet.
Connect one end of the HDMI cable into the bottom terminal of the dock labeled "HDMI OUT," then connect the other end into an HDMI port on your television or monitor.
Close the back cover of the Nintendo Switch dock.
Remove the left and right Joy-Con controllers from the console.
Position the console so that the LCD screen faces in the same direction as the front panel on the dock, then insert the console into the dock.
While the console is docked, the LCD screen will shut off.
Turn the TV set on, and select the correct HDMI input.
Connect Switch to monitor or tv