Dell B1165nfw Multifunction Mono Laser Printer - Manual (Page 23)

23 1. Introduction
Turning on the machine
1 Connect the machine to the electricity supply first.
Turn the switch on if the machine has a power switch.
Illustrations on this user’s guide may differ from your machine depending
on its options or models. Check your machine type (see "Front view" on
page 18).
2 Press (Power/Wakeup) button on the control panel.
If you want to turn the power off, press and hold (Power/Wakeup)
button for about 3 seconds.