Removal and Installation LAN Card Removal WARNING Switch off the Printer and remove the Power Cord. 1. Disconnect the LAN cable from the LAN Card at the rear of the Printer. 2. Using a flat end screwdriver, unscrew the two screws that attach the LAN Card to the Printer. 3. Remove the LAN Card and store in a safe place. 8-76 HP DesignJet 5000 and 5500 Series Printers Service Manual