Computer will only show a display on one specific monitor.

Title: Resolving Display Detection Issues Across Multiple Monitors After Hardware Upgrades

Introduction:
Experiencing display recognition problems after upgrading your PC hardware can be frustrating, especially when your system only recognizes one specific monitor. In this article, we will explore common causes and troubleshooting steps for a scenario where a newly assembled or upgraded computer displays output on only one monitor, regardless of connection attempts across different screens and cables.

Scenario Overview:
Imagine assembling a new gaming or workstation PC with the latest components—such as a new motherboard, RAM, CPU, and graphics card. The system initially functions correctly with a large ultrawide display (e.g., 34″ ultrawide monitor), showing proper output. However, when attempting to connect the same system to a different monitor—such as a TV or a standard 24″ display—nothing appears. Not even the BIOS screen or POST messages are visible on these alternative displays.

Common Symptoms:
– The primary display works normally on the ultrawide monitor.
– Secondary monitors (TV or other displays) are not recognized or show no signal.
– No BIOS or POST screens are visible on secondary displays.
– Switching HDMI ports or cables does not resolve the issue.
– The system detects the ultrawide monitor but ignores or fails to detect others.
– Reinstalling operating system or drivers has no effect.

Troubleshooting Steps:
1. Verify Cables and Connections
– Use different HDMI or DisplayPort cables to rule out faulty cables.
– Test all available ports on the GPU to ensure they are functional.
– Confirm that monitors are powered on and set to the correct input source.

1. Check Hardware Compatibility and Settings
2. Ensure that the motherboard BIOS settings are configured for estimated display output.
3. Reset BIOS to default settings to clear any misconfigurations.

4. Update the motherboard BIOS to the latest version to improve hardware compatibility.

5. Assess GPU Output Settings

6. Use your primary ultrawide monitor to update AMD drivers via AMD Radeon Software.
7. Disable features like HDCP in the driver settings temporarily.

8. Enable GPU scaling or multi-display options if available.

9. Test with Alternative Hardware

10. Try connecting the problematic monitor to another system to confirm it functions properly.

11. Connect your PC to a different monitor or TV to determine if the issue is specific to certain displays.

12. Windows and Driver Reinstallation

13. Reinstall or update graphics drivers to ensure compatibility