NEC NP40 - Manual (Page 37)

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4. Convenient Features
3. Select [On] and press the ENTER button.
The [Security Keyword] screen will be displayed.
4. Type in a combination of the four SELECT ▲▼◀▶ buttons and press the ENTER button.
NOTE: A keyword must be 4 to 10 digits in length.
The [Confirm Keyword] screen will be displayed.
5. Type in the same combination of SELECT ▲▼◀▶ buttons and press the ENTER button.
The confirmation screen will be displayed.
6. Select [Yes] and press the ENTER button.
The Security function has been enabled.
To turn on the projector when [Security] is enabled:
When the Security function is enabled and the projector is turned on, the projector will display a blue back-
ground.
To display an image at this time, press the MENU button to display the Keyword input screen.
Type in the correct keyword and press the ENTER button. The projector will display an image.
NOTE: The security disable mode is maintained until the main power is turned off or unplugging the power cable.