Repeat the steps for other device entries under the Display adapters section. Windows will scan for pending driver updates and prompt you to install them. Click on Search automatically for driver. Right-click on the available display adapter and choose Update driver. Depending on the processor and GPU you are using, you may see multiple options- Intel UHD Graphics, AMD Radeon Graphics, and Nvidia RTX/GTX graphics. In the Device Manager, expand the Display adapters section. 
Type device manager in the Windows search bar and open the app. You can also update display drivers from the Device Manager. Download and install all the pending Windows and third-party updates. To get necessary updates, go to Settings > Updates & Security > Windows Update. This is a temporary setup to allow you to install the pending driver updates after setting up your PC. New and OS upgraded computers come with a generic display adapter. Your system may fail to detect the second monitor if you run an outdated version of the display adapter drivers. Connect your monitor to another computer to determine if the issue is with your computer or monitor. Change and connect to a different input/output port if your system has multiple ports available. You may also want to check the Display or HDMI port for any issues. Check your signal cable for wear and tear. You may also want to disconnect the HDMI or DisplayPort cable, wait for a few seconds, and reconnect. Make sure the cable is connected firmly on both ends. The power button is usually located on the bottom right-hand side. 
Check if your monitor is connected to a power source and turned on. Click on the Action Center at the bottom right, then click on Project and ensure you have selected, Duplicate, or Extend. Perform a quick system restart to fix issues occurring due to temporary glitches. So before we delve into the more technical troubleshooting aspects of this guide, follow these tips to see if you have done the basics right. 
More often than not, it's the basic things that prevent your PC from detecting a secondary monitor. Basic Troubleshooting Tips to Fix When the Secondary Monitor Is Not Detected
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