Yealink VC110 - Page 221

Troubleshooting
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 Check whether the display device is connected properly to the VC110 all-in-one
unit.
 Check whether the endpoint is in sleep mode. Press any key on the VCP40 phone or
remote control to resume endpoint 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
change video input source.
 If you have configured the endpoint to obtain the time and date from the NTP
server automatically, ensure that SNTP server and time zone are configured
correctly in the endpoint and whether the connection between the endpoint and
NTP server is working properly.
 If you have configured the endpoint to obtain the time and date manually, ensure
that you have configured the time and date correctly.
 Check whether the endpoint is powered on.
 Check whether the positive and negative charges of the battery are connected
correctly.
 Check whether the battery has sufficient power left.
 Check whether no special fluorescent or neon signs nearby.
 Check whether the network of the near site is available.
 Check whether the network of the far site is available.
 Check whether the far site enables the DND feature.
 Check whether the accounts have been registered correctly, and the endpoint uses
the appropriate account to call the far site.
 Ensure that the number you are calling is correct.