NEC NP1200 User Manual page 92

4. Reattach the lamp cover.
Slip the lamp cover back until it snaps into place.
5. Connect the supplied power cable, turn on the Main Power switch and turn on the projector.
6. Finally, select the menu → [RESET] → [CLEAR LAMP HOURS] to reset the lamp life remaining and lamp
usage hours.
NOTE: When you continue to use the projector for another 100 hours after the lamp has reached the end of its life, the projector
cannot turn on and the menu is not displayed.
If this happens, press the HELP button on the remote control for 10 seconds to reset the lamp clock back to zero.
When the lamp time clock is reset to zero, the LAMP indicator goes out.
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6. Maintenance