HP 1300 Service Manual - Page 163

Service mode functions CAUTION NVRAM initialization Only perform the following procedure if absolutely necessary. Performing an NVRAM initialization resets some parameters that cannot be restored later. NVRAM initialization sets all default variables stored in NVRAM back to factory default values or to a default ROM value, depending on the variable. It also performs a system reset. NVRAM initialization resets the following: z all menu settings to factory default values z factory settings such as formatter number, page counts, and factory paper settings To perform NVRAM initialization 1 Turn the printer off. 2 Press and hold down the GO button. 3 Turn the printer on, and continue to hold the GO button for at least 20 seconds. During this process, the GO button, Attention, and Ready LEDs will each turn on. 4 Release the GO button. 5 The printer LEDs will begin cycling. The NVRAM-unit process will run until the printer is in the ready state. ENWW Service mode functions 163