HP LaserJet Enterprise M4555 MFP series - Manual (Page 66)

USB Firmware Upgrade menu
To display: At the product control panel, select the Device Maintenance menu, and then select the
USB Firmware Upgrade menu.
Insert a USB storage device with a firmware upgrade bundle into the USB port, and follow the onscreen
instructions.
Service menu
To display: At the product control panel, select the Device Maintenance menu, and then select the
Service menu.
The Service menu is locked and requires a PIN for access. This menu is intended for use by authorized
service personnel.
46 Chapter 2 Control panel menus ENWW