Removal and Installation Power Supply Removal WARNING Switch off the printer and remove the power cord. NOTE Refer to the table on Page 8-4 for information on screw types. 1. Remove the Left Hand Cover - Refer to Page 8-5 . 2. Remove 1 T-10 ( Type B ) screw from the Power Switch on the front of the Printer. 3. Disconnect the Power Supply Cable from the Electronics Module. Disconnect 8-27 HP DesignJets 500 and 800 Series Printers Service Manual