Dell Thunderbolt Dock WD22TB4 User Guide

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 Display Resolution Table 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.
• First power off the docking station by disconnecting the Type-C cable and then removing the power adapter from the dock. Then, power on the docking station by connecting power adapter to the dock before connecting the Type-C cable to your computer.
• Undock and reboot the system if, the above steps do not work.

3. The video on the attached monitor is not displaying as an Extended Monitor.

• Ensure that the Intel HD Graphics driver is installed in the Windows Device Manager.
• Ensure that the nVidia or AMD Graphics driver is installed in the Windows Device Manager.
• Open the Windows Display Properties and go to Multiple Displays control to set the display to the extended mode.

4. The USB ports are not functioning on the docking station.

• Ensure that the latest BIOS and drivers for your computer and the docking station are installed on your computer.
• If your BIOS Setup has a USB Enabled/Disabled option, make sure it is set to Enabled.
• Verify if the device is detected in Windows Device Manager and that the correct device drivers are installed.
• Ensure that the docking station is connected securely to the notebook computer. Try to disconnect and reconnect the docking station to the computer.
• Check the USB ports. Try plugging the USB device into another port.
• First power off the docking station by disconnecting the Type-C cable and then removing the power adapter from the dock. Then, power on the docking station by connecting the power adapter to the dock before connecting the Type-C cable to your computer.

5. The High-Bandwidth Digital Content Protection (HDCP) content is not displayed on the attached monitor.

• Dell Dock supports HDCP upto HDCP 2.2.

6. The LAN port is not functioning.

• Ensure that the latest BIOS and drivers for your computer and the docking station are installed on your computer.
• Ensure that the RealTek Gigabit Ethernet Controller is installed in the Windows Device Manager.
• If your BIOS Setup has a LAN/GBE Enabled/Disabled option, make sure it is set to Enabled
• Ensure that the Ethernet cable is connected securely on the docking station and the hub/router/firewall.
• Check the status LED of the Ethernet cable to confirm connectivity. Re-connect both ends of the Ethernet cable if the LED is not lit.
• First power off the docking station by disconnecting the Type-C cable and then removing the power adapter from the dock. Then, power on the docking station by connecting the power adapter to the dock before connecting the Type-C cable to your computer.

7. Cable LED is not ON after it is connected to your host.

• Make sure the WD22TB4 is connected to AC power.
• Make sure the laptop is connected with the docking station. Try to disconnect and re-connect again with the docking station.
• Make sure that the host port supports MFDP.

8. USB port has no function in a pre-OS environment.

• Check the BIOS > Integrated Devices for USB/Thunderbolt Configuration options, and make sure the following options are checked:
• 1. Enable USB Boot Support
• 2. Enable External USB Port
• 3. Enable Thunderbolt Boot Support

9. PXE boot on dock does not function.

• Check the BIOS > System Management for integrated NIC options, and select Enabled w/PXE.
• If your BIOS Setup on your computer has an USB/Thunderbolt Configuration page, please make sure the following options are checked:
• 1. Enable USB Boot Support
• 2. Enable Thunderbolt Boot Support

10. USB Boot does not function.

• If your BIOS has an USB/Thunderbolt Configuration page, please make sure the following options are checked:
• 1. Enable USB Boot Support
• 2. Enable External USB Port
• 3. Enable Thunderbolt Boot Support

• 1. Make sure the WD22TB4 is connected properly to its own adapter (130 W).
• 2. Make sure the cable LED of your docking station is ON.
• 3. Disconnect and then re-connect the Type-C/Thunderbolt 4 (Type-C) cable to your computer.

• Thunderbolt Boot Support is by default disabled in BIOS Setup on your Dell computer. With such default setting the docking station and the peripherals connected to the docking station do not work in a pre-OS environment.
• If the BIOS Setup on your computer has an USB/Thunderbolt Configuration page, check the following options to enable docking station function in a pre-OS environment:

• Enable External USB Port

• Enable Thunderbolt Boot Support

• Make sure the docking station is connected properly to its own power adapter. Computers that require more than 130 W power input must also be connected to their own power adapter for charging and optimal performance.

• The docking connector has disconnected from the system's USB/Thunderbolt ports. Please reconnect the docking cable from the system, wait for 15 seconds or more, and then dock again.

• The docking connector has disconnected from the system's USB/Thunderbolt ports. Please reconnect the docking connector.
• Undock and reboot the system if the above steps do not work.

• Avoid moving the system/dock when the docking cable is connected to the system.

• Please uncheck the option Control WLAN radio in BIOS.
• Option is available in - Settings -> Power Management -> Wireless Radio Control

• Disconnect USB Type-C from the system and the WD22TB4 power adapter.
• Re-plug the WD22TB4 AC adapter.
• WD22TB4 dock LED blinks 3 times.

Check BIOS/Firmware/Driver is updated.