An instruction or caution screen is displayed, Others (when connected to a computer), Others (remote control, speakers) – NEC E558 55" Class 4K UHD Commercial LED TV User Manual
Page 64
English - 61
An instruction or caution screen is displayed...
Symptom
Cause
Solution
Reference
A caution message is
displayed on the screen.*
1
Attention !
No Signal
Please check input signal or Connection.
The signal cable may not be connected
properly to the input or output terminals
of the monitor or the computer.
Connect properly the signal cable to
the input and output terminals of the
monitor and the computer.
P.26
The HDMI input may have switched.
Set the [CEC] setting under [Setup] ->
[HDMI Settings] to [Off].
P.79
The signal cable may be damaged.
Check that the signal cable is not
damaged.
The computer may be turned off.
Check that the computer is turned on.
The power management function of
the computer may be functioning.
Move the mouse or press a key on the
keyboard.
Out of Range
An improper signal may be input to the
monitor.
Change the frequency of the input
signal or the resolution of the
computer.
P.64
A signal with a resolution higher than
the resolution supported by the monitor
may be input.
Change the frequency of the input
signal or the resolution of the
computer.
P.64
A temperature warning is
displayed on the screen.
Warning!!
The internal temperature is high. Please check the ambient temperature.
The ambient temperature exceeds the
operation guaranteed temperature.
Turn off the power of the monitor since
this problem may cause a malfunction.
P.80
*1 Depending on the computer, a proper signal may not be output immediately after changing the resolution or the frequency and the caution
may be displayed for a while. In such a case, wait for a while. If the screen display returns to normal, it means the input signal is proper.
Others (when connected to a computer)
Symptom
Cause
Solution
I cannot change the
resolution or the number of
colors/The resolution or the
number of colors is fixed.
Sometimes, the signal cannot be input and
output.
Restart the monitor and the computer.
The driver of the video card may not be
correctly recognized by the OS.
Reinstall the video card driver. For more
information on the reinstallation procedure,
refer to the computer manual or the support
service for the computer.
Others (remote control, speakers)
Symptom
Cause and solution
Reference
The remote control is not
functioning.
● The batteries may be flat.
● Check that the batteries are inserted correctly (check the + and - sides).
● The [IR Lock Settings] may be set to [Mode 1] or [Mode 2].
The video is displayed
but there is no sound.
● Check that the audio cable is correctly connected. Check also that the audio
balance is not fully set to one side only. If the balance is set to one side only, set
it to the center.
● The sound may be muted. Press the MUTE button on the remote control or the
main unit and check that the sound is output.
● The volume may be set to the minimum. Adjust the volume using the + and -
buttons on the main unit or the VOL + and - buttons on the remote control.