HP LaserJet 4 Service Manual - Page 425

NVRAM Init NVRAM Init clears the NVRAM to its initial state. This reset is used when the NVRAM becomes full and the user would like to add additional personalities. It is possible to reconfigure the NVRAM so the new personalities have higher priority and the older personalities, while they can still be run with factory defaults, run without NVRAM. This is done by clearing the NVRAM and then adding the new personalities before adding the older personalities. To perform a NVRAM init, hold down the JOB CANCEL key while power cycling the printer. The English message, "NVRAM INIT" will be displayed briefly and the NVRAM will be initialized before the rest of the system comes up. Once the power-on self test is finished, the message "RESTORING FACTORY SETTINGS" will scroll. Note The NVRAM init set the page count back to zero and all other SERVICE MODE settings to defaults, so it is necessary to reconfigure after performing this initialization. It also sets the Tray 1 size to Letter, the envelope feeder to COM10, and the display language to English. LaserJet 5/5M/5N Printer B-31