HP Color LaserJet Pro MFP M479fdw
Service mode. Support menu
Use the support menu to print service-related reports and to run special tests. Customers do not have access to this menu.
2-line control panels (M454nw/dn models)
- From the printer control panel, press the [Cancel] button, then press the [Return] once, and then press the [Cancel] twice to gain access to the Support menu.
Touchscreen control panel (M454dw and M479 models)
- From the Home screen on the printer control panel, press the [Return] button four times to gain access to the Support menu.