Operation Steps: Step 1: Remove 4 screws Step 2: Use a pry bar to open the case Step 3: Pry out the battery (Note: pay attention to the wires) Step 4: Use a Phillips screwdriver to remove 5 screws (two types of screws) Step 5: Slowly remove the middle compartment, open the cable valve, and remove the cable with tweezers Step 6: Open the two cable valves next to the joystick, then remove the cable and remove the two screws Step 7: Replace the new joystick, and then unscrew the two screws on the joystick, insert the cable with tweezers, and close the cable valve. Step 8: Connect the compartment cables with tweezers, close the cable valve, cover the middle compartment, and tighten the screws. Step 9: Close the back cover and tighten the screws.