I did find the service manual which has.
Hp laserjet 400 color mfp m475dn factory reset.
Dear all this is driving me nuts.
After it completed and return to ready it indicates the reset is finished.
Release your finger when you are seeing permanent initialization.
Restoring the factory set defaults returns all of the printer and network settings to the factory defaults.
Note the position of the ready message on the screen.
It will not reset the page count tray size or language.
Power off the printer using the power button.
Stupid thing i set a password for my printer which i obviously don t remember now.
Download the latest drivers firmware and software for your hp laserjet pro 400 color mfp m475dn this is hp s official website that will help automatically detect and download the correct drivers free of cost for your hp computing and printing products for windows and mac operating system.
Turn the product off.
Hp laserjet pro 400 color mfp m475 choose a different product series warranty status.
Perform one of the following steps.
Unspecified check warranty status manufacturer warranty has expired see details covered under manufacturer warranty covered under extended warranty months remaining month remaining days remaining day remaining see details.
Disconnect all cables leave power cable connected.
This document is for the hp laserjet pro 300 color mfp models m375mw and hp laserjet pro 400 color mfp models m475dn and m475dw.
Hp laserjet pro restore the factory set defaults.
Or permanent initialization by power off first holding and cover the right corner left corner of the control panel when powering on.
This document explains how to set up the physical parts of the product.
Simultaneously press and hold the right arrow button and the cancel button keep these buttons depressed as you turn the product on.
To restore the printer to the factory default settings follow these steps.
It is located on the home screen at the bottom right.
You can do reset factory default by control panel menu.