AOC U2790VQ “no signal” problem between my desktop. Windows 11

Troubleshooting Connecting Issues with AOC U2790VQ Monitor and Windows 11 After Room Rearrangement

Experiencing a “no signal” message between your desktop computer and AOC U2790VQ monitor can be frustrating, especially after recent changes to your setup. If your monitor was functioning correctly prior to moving your desktop, and you’re now encountering connectivity problems, there are several factors to consider and steps you can take to resolve the issue.

Understanding the Situation

In this scenario, the user reports that:

• Their desktop computer was functioning properly before moving.
• The monitor (AOC U2790VQ) displays a “no signal” message when connected to the desktop.
• The connection works when the monitor is connected to a laptop via HDMI, indicating that the monitor and cables are functional.
• The desktop powers on, and the monitor displays content with other devices, suggesting a specific connection issue between the desktop and monitor after the move.

Potential Causes

The problem likely stems from one or more of the following:

1. Loose or Misaligned Cables: Even if the cables appear fine, they may have been disconnected or loosened during the move.
2. Incorrect Input Source: The monitor might be set to the wrong input (e.g., HDMI vs. DisplayPort).
3. Display Output Settings: The desktop’s graphics settings may have changed, disabling the output or defaulting to a different display.
4. Hardware Connectivity: The connection port on either the monitor or the PC could be damaged or dirty.
5. Graphics Driver Issues: Sometimes, driver conflicts or outdated drivers can cause display detection problems.

Step-by-Step Troubleshooting

1. Check Physical Connections:
2. Ensure all cables are securely connected to both the monitor and the PC.
3. Try disconnecting and reconnecting the cables.
4. If possible, test with a different cable to rule out a faulty wire.

5. Inspect ports for dust or damage.

6. Verify Input Source on the Monitor:

7. Use the monitor’s on-screen display menu to confirm it’s set to the correct input (HDMI, DisplayPort, etc.).

8. Switch inputs manually to see if the signal appears.

9. Test Different Ports and Cables:

10. Connect the monitor to another port on your PC.

11. Use a different video output (if available) to test alternative connections.

12. **Check Display Settings on Windows