1. Confirm the monitor input
Make sure the monitor is powered on and set to the same input type you are using, such as HDMI, DisplayPort or USB-C.
2. Check the cable and port
Reconnect both ends firmly. If possible, test a known-good cable or another output port. A working-looking cable can still fail or support fewer features than expected.
3. Ask Windows to detect it
Open Display settings and use the detect option. If the screen appears, choose whether you want to duplicate or extend the desktop.
4. Consider docks and USB-C limitations
Not every USB-C port carries video. If you use a dock or hub, confirm that the laptop port and adapter both support video output and the monitor resolution you need.
5. Driver and hardware checks
If the physical path is proven good, check the laptop or graphics manufacturer's current display driver. Test the monitor with another device when possible to isolate the fault.