Turn the Base Station on its side to achieve a better angle for the disassembly.

Use a Phillips #1 screwdriver bit to remove 3 screws securing the chip module to the rest of the base station.

After you remove the screws, you'll need to disconnect the cable connecting the two chip boards that are secured with an FPC connector.

Use your fingers to grip the two edges of the cable and firmly pull up while holding the board down. Do so carefully so as not to remove the soldered connector from the board.