NEC LT240K User Manual page 124

MAINTENANCE
8. After you install a new lamp, from the menu select [Projector Options]
[Setup]
hours.
If the projector will not be turned on after using 2100 hours (up to 3100
hours : Eco mode) of service, press and hold the [Help] button on the
remote control for ten seconds or longer to reset the lamp time clock to
zero.
Cleaning
Cleaning the Cabinet and the Lens
1. Turn off the projector before cleaning.
2. Clean the cabinet periodically with a damp cloth. If heavily soiled, use a
mild detergent. Never use strong detergents or solvents such as alcohol or
thinner.
3. Use a blower or lens paper to clean the lens, and be careful not to scratch
or mar the lens.
[Page 4] [Clear Lamp Hour Meter] to reset the lamp usage
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