Troubleshooting
24
ML23B User Manual, October 2015
Symptom
Causes
Solutions
"Out of Range"
message box
and no image on
the screen
The source signal exceeds
the maximum resolution
and/or refresh rate that the
monitor can handle
( > 1920 x 1080 resolution or
> 75 Hz refresh rate)�
Adjust the computer settings to the
monitor's native resolution:
1920 x 1080 @ 60 Hz
"No Signal"
message box
and no image on
the screen
Video cable is not plugged in
correctly�
Check the video cable connection at the
monitor, PC, and/or KVM extender.
PC is in Power Saving
mode�
Power Saving mode can usually be exited
by moving the mouse.
PC is not powered on�
Ensure PC is powered on�
PC is not sending signal.
Connect the PC to another known working
monitor to check the PC source signal.
Incorrectly
displayed or
partial image on
the screen
Monitor has not been
adjusted correctly for the
source signal.
•
Activate the "Auto Image Adjust"
function in the OSD menu�
• Fine tune the picture by manually
adjusting the image. In the OSD
menu, these functions can be found in
the "Manual Image Adjust" menu.
Wrong or
abnormal colors
(white is not
white)
Monitor color settings are
incorrectly adjusted.
Reset the monitor to the factory default
settings by activating the "Memory Recall"
function in the OSD�
Video cable is not securely
connected�
If any colors (red, green, or blue) are
missing, check the video cable to make
sure it is securely connected�
Video cable is bad�
Check to make sure there are no loose
or broken pins in the cable connector�
Shorts in the cable could also cause an
improper image to display.
The message
"OSD Locked"
appears
The OSD has been locked
to prevent unauthorized
changes to display settings.
Press and hold [1] and the up [▲] button
for 10 seconds�
The message
"Power Button
Locked"
appears
The Power button has
been locked to prevent
unauthorized shut down of
the monitor�
Press and hold [1] and the down [▼]
button for 10 seconds�
