Steps 18 and 19 involve handling sensitive electronics. Avoid static discharge.

Position the main PCB assembly into its place, being careful of the ribbon cables.

The one ribbon cable next to the white cable should be routed underneath and around the backside of the PCB board.

Screw in the two Phillips #00 screws for the left two PCB boards.

Position the black plastic cover in place. The hole in the ring on the cover should be lined up with the screw hole of the right most PCB board.

Screw in the Phillips #00 screw into right most PCB board, making sure the screw goes through both the PCB board and the plastic cover behind the board.

Although there is also a hole in the rectangular part of the plastic cover, the screw does not need to go through that part of the cover.

Remember, DO NOT touch the two adjustment knobs which are located on the right most PCB board.