Logitech G603 Wheel Encoder Replacement

Remove magnetic top cover, batteries, and wireless receiver (if currently stored inside the mouse)

Carefully remove the feet to reveal the 4 screws holding the top and bottom shells together

NOTE: These feet can be removed carefully enough to be reused. Only the top and bottom feet need to be removed, not the one around the sensor

Use Phillips #00 to remove the four bottom screws

Start at the top above the left and right click and slowly work your way around the shells until they are separated

Be careful not to damage the power connector or ribbon cable going from the top shell's boards/battery to the bottom shell's board

Start with the red and black power cable and gently pull it out

Once power cable is removed, you should be able to unfold the two halves and unplug the white ribbon cable

Gently pull out the black ribbon cable connecting the encoder board to the main board

Remove the Phillips #00 screws holding the encoder board in place

Remove the encoder board from the bottom shell

Gently remove the wheel from the older encoder board

NOTE: The old wheel can be reused in the replacement encoder board