A replacement mainboard PCB (motherboard) for the Nintendo Switch Docking station..
This PCB connects the console to a TV, charges the console and allows other accessories to connect with the console such as a wired controller.
The mainboard is held inside the outer plastics of the dock by a couple of plastic clips and is easy to remove and replace.
To access the insides of the dock you will need a tri-wing security screwdriver to remove the docks casing screws, a pair or tweezers to spudger is also recommended to help release the ribbon cable and connector on the opposite side...
A replacement board may be needed to repair one with damaged USB ports or faulty HDMI issues.