Dell 2400MP Projector - Manual (Page 29)

Using Your Projector 29
using the Password menu. This password security feature will be activated on
the next time you turn on the projector. If you enable this feature, you will
be asked to enter the projector's password after you turn on the projector:
1 1st time password input request:
a Go to Preferences menu, press Enter and then select Password to
ENABLE the password setting.
b Enable the Password function will pop-up a character screen, key in
a 4-digit number from the screen and press the ENTER button.
c To confirm, enter the password again.
d If the password verification is successful, you may resume with
accessing the projector's functions and its utilities.