If the problem persists, disconnect all connections of the dock, and uninstall the dock device driver.
Then, reinstall the device driver and the dock. See Chapter 2 “Setting up the dock” on page 7.
2.
I cannot play back videos on the external monitor but can play them back on the computer
monitor.
Some computers do not support the Certified Output Protection Protocol (COPP), and you cannot play
back the protected videos on the external monitor connected to the dock.
To play back videos on the external monitor, you can connect the external monitor to the VGA or DP
connector on your computer, and extend the display to the external monitor. For more information about
configuring the display settings, see “Setting the resolution of the external monitor” on page 12.
3.
The images on the external monitor flutter.
Check the display resolution of the computer and ensure that the resolution is supported by the dock.
4.
The computer can play back Web flashes. However, when you drag the window to the external
monitor and maximize the playback window, the playback stops.
To solve the problem, update your Adobe Flash Player program to the latest version.
5.
The external monitor display is blank, or the images on the external monitor flutter.
Connect no more than three external monitors at a time.
Audio
I cannot hear anything through my computer speakers or I cannot use the audio connectors on the
computer.
By default, ThinkPad and other Lenovo computers use the headset and microphone combo connector on
the dock and disable built-in audio connectors when the dock is connected.
To enable the built-in audio connectors on your computer, do the following:
1. Right-click the
Volume
icon in the Windows notification area.
2. Select
Sounds
, and the Sound window is displayed.
3. Click the
Playback
tab to select a built-in audio device, and then click the
Recording
tab to select
another built-in audio device.
See “Using the video output connectors” on page 10 for more information.
Note:
To apply the new settings, restart the applications that are using the audio devices. The settings you
have adjusted will be saved until you change the settings next time.
14
ThinkPad Thunderbolt 3 Dock User Guide
Summary of Contents for ThinkPad Thunderbolt 3
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