User’s Guide

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No Input Signal
when user controls
are pressed
No picture, the LED
light is white
• Check the signal source. Ensure the
computer is not in the standby mode
by moving the mouse or pressing any
key on the keyboard.
• Check whether the signal cable is
plugged in properly. Re-plug the
signal cable if necessary.
• Reset the computer or video player.
The picture does
not fill the entire
screen
The picture cannot
fill the height or
width of the screen
• Due to different video formats
(aspect ratio) of DVDs, the monitor
may display in full screen.
• Run the built-in diagnostics.
No video at HDMI/
DisplayPort port
When connected to
some dongle/
docking device at
the port, there is no
video when
unplugging/plugging
the Thunderbolt
cable from the
notebook
Unplug the HDMI/DisplayPort cable
from dongle/docking device, then plug
the docking Thunderbolt cable to the
notebook. Plug the HDMI/DisplayPort
cable 7 seconds later.
Monitor buttons
(Speaker mute/
Volume down/
Volume up/
Microphone mute)
not working with
Microsoft Teams
®
App
Monitor buttons
(Speaker mute/
Volume down/
Volume up/
Microphone mute)
not working on
Microsoft Teams
®
App with Chrome OS
/ Ubuntu
Use Microsoft Teams
®
App to perform
the below tasks:
• Call Icon to accept / hang up call
• Volume down / Volume up
adjustment
• Mic mute / unmute
• Camera on / off
Video recording
not working
Video recording App
not working with Win
7
• Windows 7 not supported
• Switch to Windows 10