Acer P1223 - Manual (Page 47)

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OSD messages
2 Lamp burns out or makes a
popping sound • When the lamp reaches the end of its
useful life, it will burn out and may make
a loud popping sound. If this happens,
the projector will not turn on until the
lamp module has been replaced. To
replace the lamp, please refer to
"Replacing the lamp" on page 41.
# Condition Message
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 may be used.
Replace the lamp - the lamp is about to reach its maximum
lifetime. Prepare to replace it soon.