NEC NP41 User Manual page 71

(2) Remove the cooling pump cover.
Contact area of the connector
NOTE: Keep the contact area of the connector clean. If there are dust and dirt in the contact area of the connector, remove them.
7. install a new cooling pump.
(1) Align the tabs on the cooling pump cover with the guide on the cabinet and slide the cooling pump cover.
(2) Tighten the cooling pump cover screw.
- Be sure to tighten the cooling pump cover screw.
Ths completes the coolng pump replacement.
Go on to the next step.
8. Connect the supplied power cable and turn on the projector.
9. finally, select the menu → [reset] → [Clear laMP hOUrs] to reset the lamp usage hours.
NOTE: When the lamp exceeds 2600 hours (up to 3600 hours in ECO mode) of service, 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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