Can anyone supply me with information on how to re-add the serial number and formatter number to a HP4000 printer. Currently they are showing as XXXX on the configuration page.
To access service mode, hold Job Cancel + Select during powerup until all LEDs are lit, then press the right side of Menu, then Select. If all goes well you should see a message that says SERVICE MODE on the display briefly, then after the printer finishes its startup, you will have a new menu entitled SERVICE MENU. Serial Number will be an option; it is set with the Value and Select keys. Press GO to exit Service Mode once the changes are made.
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