Symptoms and solutions – Dell ThunderDock WD22TB4 User Manual
Page 34
Troubleshooting the Dell Thunderbolt Dock -
WD22TB4
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Symptoms and solutions
Table 18. Symptoms and solutions
Symptoms
Suggested solutions
1. No video on the monitors attached to the High Definition
Multimedia Interface (HDMI), or DisplayPort (DP) port on the
docking station.
●
Ensure that the latest BIOS and drivers for your computer
and the docking station are installed on your computer.
●
Make sure your computer is connected to the docking
station securely. Try to disconnect and reconnect the
docking station to the notebook computer.
●
Disconnect both ends of the video cable and check for
damaged/bent pins. Securely re-connect the cable to the
monitor and docking station.
●
Make sure the video cable (HDMI, or DisplayPort) is
connected properly to the monitor and the docking
station. Ensure to select the correct video source on your
monitor (refer to your monitor’s documentation for more
information about changing the video source).
●
Check the resolution settings on your computer. Your
monitor may support higher resolutions than what the
docking station is able to support. Please see the
for more information on maximum
resolution capacity.
●
If your monitor is connected to the docking station, the
video output on your computer may be disabled. You can
enable the video output using the Intel Graphics Control
Panel or refer to the User Guide of your computer.
●
If only one monitor is shown, while the other is not, go to
Windows Display Properties, and under
Multiple Displays
,
select the output for the second monitor.
●
Using Intel graphics and using the system LCD, only two
displays can be supported.
●
For Nvidia or AMD discrete graphics, the dock supports
three external displays plus the system LCD.
●
Try with a different monitor and cable that is known to be
good, if possible.
2. The video on the attached monitor is distorted or flickering.
●
Reset the monitor to Factory Defaults. Refer to the User
Guide of your monitor for more information on how to
reset the monitor to factory defaults.
●
Ensure that the video cable (HDMI, or DisplayPort) is
connected securely to the monitor and the docking
station.
●
Disconnect and reconnect the monitor/s from the docking
station.
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Troubleshooting the Dell Thunderbolt Dock - WD22TB4