Dell W5300 Workgroup Laser Printer - Manual (Page 111)

Press and hold Select and Return and turn the printer on. 2.
Release the buttons when you see Performing Self Test. 3.
Config Menu appears on the first line of the display.
Press Menu until you see Panel Menus, and then press Select. 4.
Disable appears on the second line of the display.
Press Select. 5.
Locking Menus appears briefly.
Press Menu until you see Exit Config Menus, and then press Select. 6.
The menus are disabled. If you press Menu, the message Menus Disabled appears.
Enabling menus
Repeat step 1 through step 4 in Disabling operator panel menus . 1.
Press Menu until you see Enable. 2.
Continue with step 5 and step 6 in Disabling operator panel menus .