IF it’s a Dell monitor check out their troubleshooting page
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While it is Windows 10, you can try to boot into Safe Mode. After rebooting in Safe mode, select option 5 to launch the system into Safe Mode with Networking. Now do a system search for Device Manager and select the relevant result. Click the arrow next to Display drivers to expand the category. Right-click graphics card, click Uninstall, check Delete the driver for this device and then click OK. Restart your system again. Windows installs the driver automatically.