HP LaserJet 4250 Service Manual - Page 340

NVRAM initialization CAUTION Initializing the NVRAM resets the serial number, the event log, the page counts, the EIO card, and the embedded print server. Initializing the NVRAM also resets service-menu values to factory defaults. Use the service menu to restore the serial number and page counts. Also reconfigure any computers that print to this printer so that the computers can recognize the printer. Initialize the NVRAM only when absolutely necessary. In most situations, use a cold reset rather than a NVRAM initialization to reset printer settings (this will retain the values in the service menu). NOTE Before performing a NVRAM initialization, print a menu map and a configuration page (see Menu map and Configuration page). Use the information on the configuration page to reset any customer-set printer configuration values that the NVRAM initialization procedure changes. Make note of the total page count, maintenance count, and the serial number. To initialize NVRAM 1 Turn the printer power off. 2 Remove any installed accessories (for example, a stapler/stacker). 3 For HP Laserjet 4200/4300 Series printers: Hold down ( SELECT button), and then turn the printer power on. For HP Laserjet 4250/4350 Series printers: Turn the printer power on, and then hold down (SELECT button) when the memory count begins. 4 Continue holding down until all three printer control-panel lights flash once and then remain on. This might take up to 10 seconds. 5 Press ( UP ARROW button). 6 Press the PAUSE/RESUME button (LJ 4200/4300) or the MENU button (LJ 4250/4350). The display should show SKIP DISK LOAD. 7 Press until NVRAM INIT is highlighted. 8 Press . The printer initializes NVRAM and then continues its power-on sequence. 326 7 Troubleshooting