VSI - Replacement of Keypad

Using a scalpel or similar tool, peel off the existing Keypad.
Carefully clean the area to which the new Keypad will adhere, ensuring no internal contamination of the unit. An alcohol-based cleaner is recommended for this.
Carefully fit the new Keypad, ensuring the pads of the keys are not touched and remain clear of any contamination.
Test the VSI to ensure all functions operate correctly.