Acer X1237 - Manual (Page 41)

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OSD Messages
# Condition Message Reminder
1 Message Fan Fail - the system fan is not working.
Projector Overheated - the projector has exceeded its
recommended operating temperature and must be allowed to
cool down before it is used. Please also check the dust filters if
they are installed. If the dust filter is clogged with dust, please
clean it.
Replace the lamp - the lamp is about to reach its maximum
lifetime. Prepare to replace it soon.
Fan Fail.
Lamp will automatically turn off soon.
Projector Overheated.
Lamp will automatically turn off soon.
Lamp is approaching the end of its useful life in full power operation.
Replacement suggested!