User Guide

Iftheproblempersists,disconnectallconnectionsofthedock,anduninstallthedockdevicedriver.
Then,reinstallthedevicedriverandthedock.SeeChapter2“Settingupthedock”onpage7
.
2.Icannotplaybackvideosontheexternalmonitorbutcanplaythembackonthecomputer
monitor.
SomecomputersdonotsupporttheCertifiedOutputProtectionProtocol(COPP),andyoucannotplay
backtheprotectedvideosontheexternalmonitorconnectedtothedock.
Toplaybackvideosontheexternalmonitor,youcanconnecttheexternalmonitortotheVGAorDP
connectoronyourcomputer,andextendthedisplaytotheexternalmonitor.Formoreinformationabout
configuringthedisplaysettings,see“Settingtheresolutionoftheexternalmonitor”onpage12
.
3.Theimagesontheexternalmonitorflutter.
Checkthedisplayresolutionofthecomputerandensurethattheresolutionissupportedbythedock.
4.ThecomputercanplaybackWebflashes.However,whenyoudragthewindowtotheexternal
monitorandmaximizetheplaybackwindow,theplaybackstops.
Tosolvetheproblem,updateyourAdobeFlashPlayerprogramtothelatestversion.
5.Theexternalmonitordisplayisblank,ortheimagesontheexternalmonitorflutter.
Connectnomorethanthreeexternalmonitorsatatime.
Audio
IcannothearanythingthroughmycomputerspeakersorIcannotusetheaudioconnectorsonthe
computer.
Bydefault,ThinkPadandotherLenovocomputersusetheheadsetandmicrophonecomboconnectoron
thedockanddisablebuilt-inaudioconnectorswhenthedockisconnected.
Toenablethebuilt-inaudioconnectorsonyourcomputer,dothefollowing:
1.Right-clicktheVolumeiconintheWindowsnotificationarea.
2.SelectSounds,andtheSoundwindowisdisplayed.
3.ClickthePlaybacktabtoselectabuilt-inaudiodevice,andthenclicktheRecordingtabtoselect
anotherbuilt-inaudiodevice.
See“Usingthevideooutputconnectors”onpage10formoreinformation.
Note:Toapplythenewsettings,restarttheapplicationsthatareusingtheaudiodevices.Thesettingsyou
haveadjustedwillbesaveduntilyouchangethesettingsnexttime.
14ThinkPadThunderbolt3DockUserGuide