What do I do when my second monitor says no signal?
Turn the display off and then on again. That may be all it needs to recognize the video feed and start displaying it correctly. Verify cable connections: A loose cable can cause “no signal” errors more often than any other problem. If they do seem well secured, unplug, and plug them in again just to be sure.
Why does my monitor say no signal but my PC is on?
A faulty, loose, or wrongly-placed cable is one of the most common reasons for a monitor saying no signal. Here’s how to properly check your DVI, HDMI or DisplayPort cables: Unplug each cable and then replug them. It sounds obvious, but you should also make sure each cable is in the right place.
Why is my second monitor not displaying?
If the second monitor’s screen is also blank, it could be a video cable issue. If you have multiple connection options such as DVI, HDMI, etc., try replacing the video cable or using a different video cable. If VGA works, then there may be a problem with your HDMI or DVI cable.
How do I get my second monitor to work?
Set the Primary and Secondary Monitor
- Right-click on your desktop and select “Display”.
- From the display, select the monitor you wish to be your main display.
- Check the box that says “Make this my main display.” The other monitor will automatically become the secondary display.
- When finished, click [Apply].
Why can’t I connect my second monitor?
A buggy, outdated, or corrupted graphics driver may be one of the main reasons why Windows 10 won’t detect your second PC monitor. To resolve this issue, you can update, reinstall, or roll back the driver to a previous version to fix and restore the connection between your computer and the second monitor.
How do I know if my HDMI port is working Windows 10?
Make sure that the HDMI cable is inserted correctly and all the connections are fully functional. Right-click on the volume icon on the taskbar. Select Playback devices and in the newly open Playback tab, simply select Digital Output Device or HDMI. Select Set Default, click OK.
Why is extend display not working?
Update or Reinstall Your GPU Driver Launch the Device Manager and expand your Display adapters. Then right-click on your GPU and select Update driver. Restart your computer and check if you can extend your desktop. If the issue persists, go through the same steps and select Uninstall device.
Why is my second HDMI port not working?
If your HDMI connection is still not working, it’s likely there are hardware issues with your HDMI port, cable or your devices. This will resolve any problems you might be experiencing due to your cable. If changing the cable doesn’t work for you, try your HDMI connection with another TV or monitor or another computer.