The second reminder can be connect via either the USB - C transmission line or HDMI larboard . It depends on the case of monitor , CPU , or laptop computer model that you own . chequer the specifications first . Now , if your Windows reckoner is not detecting or extending thesecond monitor lizard , you may force it to or trouble-shoot the publication using these solutions . Here ’s what to do ifdual monitoris not being detected on a Windows PC .
Table of content
Before You Begin
Here are some simple steps you may take to verify everything is in order before beginning with the troubleshooting . Please do n’t skip this section as it carries some little - known thaumaturgy too .
1. Turn Off Monitors Before Connecting
Turn off both the reminder and then reverse it back on . Sometimes , when a 2nd monitor is connected , Windows fails to recognize the admonisher . A dewy-eyed reboot help oneself reset the signal or freshen the monitor ’s joining , helping Windows detect it . There is a reasonwhy become devices off and on worksand is one of the first things you should try .
2. Enable Extend Option in Windows
There are two elbow room to turn on the extend option which will extend or project the screenland from the first or main filmdom to the second monitor . We will partake in a simple keyboard shortcut for it . This is because , by default option , Windows will display the monitor in mirror or duplicate mode .
PressCtrl+Pto afford the Project screen and selectExtendoption .
3. Force Detect Second Monitor Manually
A common job many Windows user look while connect and extending a second screen is that the primary microcomputer , be it laptop or desktop , can not detect the second screen . May be that ’s why twofold monitoring gadget is not extending or detecting at all .
1.PressWindows+Ito open preferences and go toSystem > Display . Click onMultiple displays .
2.Click onDetectbutton next toDetect other displayoption .
Pro Tip : Once the showing is find and extended , if you are n’t sure which presentation is mark as 1 and which is 2 , click onIdentifybutton . Your primary monitor or screen should be marked as 1 . If not , you could change that here . Select the monitor and then check theMake this my principal displayoption below .
4. Check Scale, Resolution
For most users , the nonpayment preferences are ripe enough . However , since a dual monitor is not being detected , you could try a different scale and firmness of purpose .
1.PressWindows+Ito exposed preferences and go toSystem > Display . Scroll a little and you will findScaleandDisplay resolution .
2.You will see 150 % scale of measurement and 2560×1440 resolve in the above screenshot . That is for sieve 1 in our casing . pick out the projection screen that is not being detected . It should be screen 2 .
3.The minute you modify the screen , the default solvent and scale will also transfer consequently . In our case , you will see 100 % and 1920×1080 now . Set it to recommended stratum if not already . If that does n’t influence , position it to the resolution that your reminder substantiate .
5. Set Same Refresh Rate
Some users experimented with the refresh rate and found that setting the same refresh rate on both monitors extended the varan on their PC .
1.Go back toSettings > System > Display . choose the exhibit at the top .
2.Click onAdvanced display .
3.you’re able to select a refresh rate for the selected monitor next toChoose a refresh ratesection .
4.Now go back toDisplayand select the second monitor and make indisputable the refresh charge per unit is the same here as in the first reminder .
Note : You need a high refresh rate while gaming . While browsing , writing , or doing other unsubdivided tasks , a higher refresh rate is not really required and wo n’t make much of a difference .
6. Update Display and Graphics Card Driver
Since this is a display - related problem where the screen is not extend to a second monitor , update the driver might help .
1.Press theWindows keyto open Windows Start menu and look for theDevice Manager . Open it .
2.You will rule computer graphic card heel underDisplay adaptersand both screens underMonitors . two-fold - sink in on expand them .
3.Right - press the number one wood you require to update and selectUpdate gadget driver .
Do this for both primary and secondary monitor and again for unified and dedicated artwork card .
7. Uncheck HDR for Second Monitor
OneRedditor foundout that when he extends the monitor , HDR gets enable for the second screen but when he duplicates the monitor , HDR gets disabled for both screens . So try this — either enable HDR for both or disable it for both monitors .
1.To do that , go back toSettings > System > Display . Click onHDR .
2.Select the exhibit for which you need to change the HDR setting . Then disableHDR telecasting streamingoption below .
3.Now repeat the same stair for the other presentation and control if your screen is extended to the 2d monitor or not . If the 2d monitor is still not detected , enable HDR on both blind .
8. Delete Registry Key
If you are insure the ‘ unable to save video display preferences ’ when you attempt to extend the display , Microsoft recommendsdeleting a registry cay . It ’s easy than it voice .
Microsoft has share the stepsto do so quite clear . It will erase any salvage multiple monitor constellation from your data processor . So you could get afresh .
2.Navigate to the brochure body structure below .
3.Right - select the sub - key or file in the right windowpane pane and edit it . If actuate , click onYes .
More Is Merrier
A multiple proctor setup can help oneself get more thing done quickly because you do n’t have to trade between windows back and forth . But you believably already be intimate that . Hopefully , your three-fold monitor is now detected and extended now without issue . window can be a niggling buggy when it comes to dual or threefold monitoring gadget setups .
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