NEC NP-PE401H User's Manual - Page 66

Problem: Message Reminders, and then press and hold the HELP button on the remote control

Page 66 highlights

Appendices Problem: Message Reminders  Over temperature - the projector has exceeded its recommended operating temperature and must be allowed to cool down before it may be used.  Replacing the lamp - the lamp is about to reach its maximum life- time. Prepare to replace it soon. 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. If this happens, after replacing the lamp, connect the power cord and then press and hold the HELP button on the remote control at least 10 seconds. This will allow you to turn on the projector. Clear the lamp hours by selecting "OPTIONS" -> "LAMP/FILTER SETTINGS" -> "CLEAR LAMP HOURS" from the menu.  Fan failed - the system fan is not working.  Cleaning the filter 59 ... English

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59
... English
Appendices
Problem: Message Reminders
Over temperature - the projector has exceeded its recommended
operating temperature and must be allowed to cool down before it
may be used.
Replacing the lamp - the lamp is about to reach its maximum life-
time. Prepare to replace it soon.
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.
If this happens, after replacing the lamp, connect the power cord
and then press and hold the HELP button on the remote control at
least 10 seconds. This will allow you to turn on the projector. Clear
the lamp hours by selecting “OPTIONS” -> “LAMP/FILTER SET-
TINGS” -> “CLEAR LAMP HOURS” from the menu.
Fan failed - the system fan is not working.
Cleaning the filter