HP 2500 Service Manual - Page 211

Service mode functions Note Cold reset A cold reset sets most, but not all, default variables stored in NVRAM back to factory default values. For example, It typically does not reset the page count, paper tray sizes, localization language, or formatter number. To reset all variables, see "NVRAM initializer" on page 209. To perform a cold reset 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 4 After the Go, Attention, and Ready LEDs turn on, continue holding the GO button for approximately five seconds, but not longer than fifteen seconds. During this process, the Attention LED will turn off. 5 Release the GO button. If either the Go or Ready LED turned off or no LEDs turned off before the GO button was released, then repeat steps 1 through 5. 6 The printer LEDs will begin cycling from front to back. The cold-reset process runs until the printer is in the Ready state. NVRAM initializer NVRAM initializer 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 initializer resets the following:
all menu settings to factory default values
factory settings such as formatter number, page counts, factory paper settings To perform a NVRAM init 1 Turn the printer off. 2 Press and hold the GO button. 3 Turn the printer on and continue to hold the GO button. 4 After the Go, Ready, and Attention LEDs turn on, continue holding for at least 20 seconds. During this process, the Attention, Ready, and Go LEDs will each turn off. 5 Release the GO button. 6 The device LEDs will begin cycling from front to back. The NVRAM-init process runs until the printer is in the Ready state. EN 6 Troubleshooting 209