Troubleshooting the Dell Thunderbolt DockingStation WD19TBTopics:• Symptoms and solutionsSymptoms and solutionsTable 17. Symptoms and solutionsSymptoms Suggested solutions1. No video on the monitors that are attached to the HighDefinition Multimedia Interface (HDMI), or DisplayPort (DP) porton the docking station.• Ensure that the latest BIOS and drivers for your system andthe docking station are installed on your system.• Ensure that your system is connected to the docking stationsecurely. Try to disconnect and reconnect the docking stationto the notebook system.• Disconnect both ends of the video cable and check fordamaged/bent pins. Securely re-connect the cable to themonitor and docking station.• Ensure the video cable (HDMI, or DisplayPort) is connectedproperly to the monitor and the docking station. Ensure toselect the correct video source on your monitor (see yourmonitor’s documentation for more information about changingthe video source).• Check the resolution settings on your system. Your monitormay support higher resolutions than what the docking stationcan support. See the Display Resolution Table for moreinformation about maximum resolution capacity.• If your monitor is connected to the docking station, the videooutput on your system may be disabled. You can enable thevideo output using the Windows Control Panel or see the UserGuide of your system.• If only one monitor is shown, while the other is not, go toWindows Display Properties, and under Multiple Displays,select the output for the second monitor.• Using Intel graphics and using the system LCD, only twoadditional displays can be supported.• For NVIDIA or AMD discrete graphics, the dock supports threeexternal displays plus the system LCD.• Try with a different monitor and cable that is known to begood, if possible.2. The video on the attached monitor is distorted or flickering. • Reset the monitor to Factory Defaults. See the User Guide ofyour monitor for more information about how to reset themonitor to factory defaults.• Ensure that the video cable (HDMI, or DisplayPort) isconnected securely to the monitor and the docking station.• Disconnect and reconnect the monitor/s from the dockingstation.• First power off the docking station by disconnecting the Type-C cable and then removing the power adapter from the dock.13Troubleshooting the Dell Thunderbolt Docking Station WD19TB 37