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In Windows 10, setting up a second monitor is an advantageous method of growing workspace material for working with various applications and playing games on your PC or desktop.
Despite the fact that connecting an external program is usually a direct loop, in some cases Windows 10 may not identify more established programs or second screens due to driver or hardware related issues. However, assuming your device has this problem, there are a few research steps (including actually taking a look at the connection and installing the correct drivers) to quickly fix the problem.
In this Windows 10 help, we’ll walk you through three viable ways to investigate and fix problems that might be preventing the system from automatically distinguishing the second monitor.
Fixes for ‘second monitor not detected’:
- If your video driver is outdated, incorrect, or faulty, Windows 10 (and Windows 7) will not be able to extend or mirror your desktop to your second screen. Reverting the driver to an earlier version may fix the problem.
- If not, updating the driver almost certainly will. If, unfortunately, after fixing the video driver problem, Windows 10 still cannot detect your second monitor, try Fix 3, then Fix 4.
Revert to a previously installed video driver
- Sometimes the latest drivers don’t work properly in Windows 10. To check if this is what is causing your problem, simply revert to an older version of your video driver (aka “display driver”).
- On your keyboard, press the Windows logo key and R (at the same time) to invoke the Run box.
- Type devmgmt.msc and press Enter.
- In the Display Adapters section, right-click your display device software and select Properties.
- Select the Driver tab and click Revert Driver, then follow the instructions on the screen.
- When done, restart your computer and see if Windows can now detect your second monitor.
Update your video driver
- If reversing your video driver doesn’t allow Windows 10 to recognize your second monitor, chances are you’re using the wrong driver. There are two ways to obtain the correct driver for your video card: manually or automatically.
- Manual Driver Update – You can update your video driver manually by going to your video card manufacturer’s website and searching for the latest correct driver. Make sure to choose the only driver that is compatible with your variant of Windows 10.
- Automatic Driver Update – If you don’t have the time, patience, or computer skills to update your video driver manually, you can do it automatically with Driver Easy. Driver Easy will automatically recognize your system and find the correct driver for your exact video card and its Windows 10 variant, and download and install it correctly:
- Download and install Driver Easy. Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any driver issues.
- Click Update All to automatically download and install the correct version of all missing or outdated drivers on your system. (This requires the Pro version that comes with full support and a 30-day money-back guarantee. You will be prompted to update when you click Update All.)
- Restart your computer and check if Windows 10 / Windows 7 can now detect your second monitor.
Make sure your monitor refresh rates are set to the same
- The monitor / screen refresh rate is the number of times in one second that your screen updates images. When two monitors are connected to Windows 10 together, the refresh rate plays a vital role. Some graphics cards do not support different refresh rates at the same time.
- So if the screen refresh rate of your two monitors is different, your second monitor is probably undetectable.
- Follow to make sure your monitor refresh rate is the same:
- On your keyboard, hold down the Windows logo key, then press the I key.
- Click System in the Settings pop-up window.
- Click Advanced Display Settings in the Display section.
- Click Display Adapter Properties for Display 1, and then click Display Adapter Properties for Display 2.
- Check the screen refresh rate of both monitors in the Monitor sections.
- If the rates are different, change any of them to set them there. Then save your change with Apply> OK and proceed to check if your second monitor was detected correctly.
- If the same rates have already been set, continue to the next solution.
Change your project mode
- Sometimes your second monitor cannot be detected due to incorrectly configured project mode. Quickly and easily change the mode of your project by following these two steps:
- On your keyboard, hold down the Windows logo key, then press the P key.
- Select Duplicate if you want to display the same screen on your two monitors. Select Extend if you want to earn more at the workplace.
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