NEC 4T-B70CT1U 4T-B Series Operation Manual - Page 91

Troubleshooting Continue

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Appendix
Troubleshooting (Continue)
Problem
Possible Solution
No sound
Is connection to other components correct?
Is the volume too low?
Page 3-2
Have you pressed
MUTE
on the remote control unit?
Page 3-3
Check the audio output of the connected external equipment. Is the
volume too low or muted?
When external equipment is connected via an HDMI cable, you
may need to configure the audio to be output through the HDMI
cable.
Cautions regarding use in high and low temperature environments
When the unit is used in a low temperature space (e.g. room, office), the picture may leave trails
or appear slightly delayed. This is not a malfunction, and the unit will recover when the
temperature returns to normal.
Do not leave the unit in a hot or cold location. Also, do not leave the unit in a location exposed
to direct sunlight or near a heater, as this may cause the cabinet to deform and the front panel
to malfunction.
Storage temperature: -4°F to +140°F (-20°C to +60°C)
ENG 10-3