Troubleshooting The Printer does not Power ON 1. Check that the Power Cord is connected correctly to the Printer and to the Power Socket. 2. Check that the Power Switch on the BACK of the Printer is in the ON position. 3. Remove the DIMM’s Cover (See ⇒ Page 8-75 ) and check the green and red Status LED’s on the Main PCA. If they are both NOT lit, replace the Power Supply Unit ⇒ Page 8-83 . Status LED’s 4. Check that the Front-Panel Cable is correctly connected to the Electronics Module. Also make sure that the Front-Panel Cable is not damaged. 1-5 HP DesignJet 5000 Series Printers Service Manual