Hitachi CP-X306 User's Manual And Operating Manual page 79

Troubleshooting
Phenomena that may be easy to be mistaken for machine defects (continued)
Phenomenon
70
Cases not involving a machine defect
The signal cables are not correctly connected.
The MUTE function is working.
The AUDIO/SPEAKER setting is not correct.
The lens cover is attached.
The signal cables are not correctly connected.
The computer cannot detect the projector as a plug
and play monitor.
The BLANK screen is displayed.
BLANK
MUTE VOLUME + -
Reference
page
10
16
16
36
10
11
21