If you suspect that the issue lies with the connected device, try the following steps:
1. Ensure that the device is powered on and functioning properly.
2. Try connecting the device to a different monitor or display to see if it works.
3. Update the graphics driver on your computer or check for any software/firmware updates for other devices.
4. If using a laptop, make sure the display output is enabled (usually done by pressing a combination of function keys, such as Fn+F4 or Fn+F7).