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How to Disassemble the Keychron M4 Mouse

If everything works fine with your mouse, it is not recommended to try this at home as it can risk injuries and damage caused by disassembling. Disassembling the M4 will void its returns and warranty.

Step 1:  Please peel off the films on the back of the mouse and unscrew one screw. Gently lift the top case and pull back to open both the top and bottom cases. 

Step 2: Proceed to disconnect the two cables (from the side button board to PCB and from the battery to PCB). 

There is a small buckle where the ribbon cable connected, push the small white buckle up to release the ribbon.

Step 3: Afterward, unscrew the four screws on the PCB and remove the battery (Note: the battery is glued to the black standoff). Unscrew the three screws from the PCB underneath the wheel. Your disassembly is now complete.