Dahua Technology DHI-LM55-F400, User Manual

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User’s Manual
25
7.2. Troubleshooting
Symptom Possible Cause Remedy
No picture is displayed 1. The power cord is disconnected.
2. The main power switch on the back
of the display is not switched on.
3. The selected input has no
connection.
4. The display is in standby mode.
1. Plug in the power cord.
2. Make sure the power switch is
switched on.
3. Connect a signal connection to
the display.
Interference displayed
on the display or
audible noise is heard Caused by surrounding electrical
appliances or fluorescent lights. Move the display to another location
to see is the interference is reduced.
Color is abnormal The signal cable is not connected
properly. Make sure that the signal cable is
attached firmly to the back of the
display.
Picture is distorted with
abnormal patterns 1. The signal cable is not connected
properly.
2. The input signal is beyond the
capabilities of the display.
1. Make sure that the signal cable
is attached firmly.
2. Check the video signal source to
see if it is beyond the range of
the display. Please verify its
specifications with this display’s
specification section.
Can hear sound, but no
picture Improperly connected source signal
cable. Make sure that both video inputs and
sound inputs are correctly
connected.
Can see picture but no
sound is heard 1. Improperly connected source signal
cable.
2. Volume is turned all the way down.
3. {Mute} is turned on.
4. No external speaker connected.
1. Make sure that both video
inputs and sound inputs are
correctly connected.
2. Press [+] or [-] button to hear
sound.