HP and 8150 MFP manual Factory defaults from the Resets Menu

Chapter 1	Printer Basics	57
Key	Function
MENU	Cycles through the control panel menus. Press the right end of the
	button to move forward or the left end of the button to move backward.
ITEM	Cycles through the selected menu’s items. Press the right end of the
	button to move forward or the left end of the button to move backward.
	The Item key is also used to navigate through the printer’s online Help
	system (see page 227).

-VALUE + Cycles through the selected menu item’s values. Press + to move forward or - to move backward.

SELECT	! Saves the selected value for that item. An asterisk (*) appears next
	to the selection, indicating that it is the new default. Default settings
	remain when the printer is switched off or reset (unless you reset all
	factory defaults from the Resets Menu).
	! Prints one of the printer information pages from the control panel.

Control Panel Layout