Hitachi CP-X417 User's Manual And Operating Manual page 83

Troubleshooting
Phenomena that may be easy to be mistaken for machine defects (continued)
Phenomenon
74
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 audio on your HDMI equipment is not set to
Linear PCM.
The audio on the HDMI input is muted.
The digital audio in HDMI signal does not work well.
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.
Reference
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