Administrator’s Guide for Yealink Video Conferencing Systems
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The web page displays the diagnosis:
4. Click Stop to complete diagnosing.
You can click Copy to copy the content to the clipboard.
Troubleshooting Solutions
This chapter provides general troubleshooting solutions to help you solve the problems you
might encounter when using your system.
Ensure the system has not been physically damaged when experiencing a problem. Check
whether the cables are loose and the connections are correct and secure. These are common
causes of problems.
If problems you encounter are not mentioned in this chapter, you can contact your distributor
or Yealink FAE.
General Issues
Why is the display device black?
Check whether the display device is connected properly to the VC400/VC120 Codec.
Check whether the system is in sleep mode. Press any key on the video conferencing
phone or remote control to resume system operation.
Check whether the display device is in sleep mode or is turned off. Press the power button
on the remote control or on the display device.
Check whether you have selected the correct video input source. You can try to switch
video input source.
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