Hitachi CP-WU5500 User's Manual And Operating Manual page 118

Troubleshooting
Phenomena that may be easy to be mistaken for machine defects (continued)
Phenomenon
118
Cases not involving a machine defect
The signal cables are not correctly connected.
The volume is adjusted to an extremely low level.
The AUDIO SOURCE/SPEAKER setting is not correct.
The MUTE function is working.
The signal cables are not correctly connected.
The brightness is adjusted to an extremely low level.
The computer cannot detect the projector as a plug
and play monitor.
The lens shade is closed.
The BLANK screen is displayed.
BLANK
LAN
MUTE VOLUME +/-
Reference
page
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