You need to purchase a set of S6000 clear chips U28 & U43. Turn power off. Pull out the U28 & U43 Main chips. Install the clear chips into the U28 & U43 sockets. Now you will do the clear procedure. With power off. Hold down both the TEST & PSEUDO buttons on the MPU. Keeping holding the buttons. Now turn ON the power while still holding down the two buttons. Hold the buttons down till the SPIN, MAX BET, and other deck buttons light up on the outside of the door, start flashing. Now you can let go of the TEST & PSEUDO buttons on the MPU. Turn off the power. Take out the clear chips and reinstall the MAINS. Install the MPU , keep the door open and turn the power on. The reels will go through a calibration spin and dance and then stop moving. With the door still open after the reels calibration is completed, the LED display will be flashing numbers. On the outside of the door on the button deck, Press the furthest button to the left , the SERVICE/CHANGE button once. Close the door and you are good to go.