NEC NP4001 User Manual page 100

5. Using On-Screen Display
Background
Background enables you to display a blue/black screen when there is no signal. The de-
fault background is blue.
Select from the following:
Blue
Black
Logo
Security
See Preventing the Unauthorized Use of the Projector on page 57.
Control Panel Lock
Turn On/Off the Key Lock function for cabinet buttons.
Note:
This Control Panel Lock does not affect the remote control functions.
When the control panel is locked, pressing and holding the Exit button on the
projector cabinet for about 10 seconds. The setting will change to Off.
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