The Mystery of the Non-Functioning USB-C: Insights into ASUS B650E-I Issues


I’ve encountered an issue with the USB-C port on my new ASUS B650E-I GAMING WIFI motherboard, which I primarily use for DP Alt Mode with Hybrid Graphics. It was functioning correctly until I enabled Hybrid Graphics in the BIOS. Post this change, the system failed to boot, indicated by the persistent white VGA diagnostic LED and no monitor signal. Attempts to revert or reset the BIOS settings were unsuccessful.

The following day, the system booted without the VGA LED issue, yet the DP Alt Mode over USB-C ceased to work. While the iGPU HDMI and dGPU ports are operational, and the USB-C port still delivers power, it fails to transmit data or recognize connected devices, such as my phone. Additionally, the port appears to be undetected in the BIOS, though I cannot confirm if it was recognized prior to the issue.

Online resources for this problem are scarce, and none have led to a resolution. Considering the motherboard is new and was previously functional, and that only this specific port is affected, I’m inclined to believe it’s not a hardware failure. Could you provide some guidance on this matter?”


If you’re experiencing problems with the USB-C port on your ASUS B650E-I GAMING WIFI motherboard, particularly after enabling Hybrid Graphics in the BIOS, there are several steps you can take to troubleshoot and potentially resolve the issue.

The USB-C port was operational until a BIOS setting for Hybrid Graphics was changed. After this adjustment, the system wouldn’t boot, and the white VGA diagnostic LED indicated a problem. Despite reverting the BIOS settings, the issue persisted. The next day, the system booted, but the USB-C port’s data transfer capability was compromised.

Troubleshooting Steps:


Check for Physical Damage:

Ensure that there is no physical damage to the USB-C port and that the cable you’re using is in good condition.


BIOS Update and Settings:

  • Update your BIOS to the latest version, as this can resolve compatibility issues and improve functionality.
  • After updating, reset the BIOS to its default settings to see if this resolves the issue.
  • 3.

Driver Reinstallation:

  • Reinstall the USB Root Hub and USB Host Controller drivers through the Device Manager. This can help if the current drivers are corrupted or outdated.
  • If your motherboard supports Thunderbolt, reinstall the Thunderbolt driver as well.
  • 4.

Hardware Troubleshooting:

  • If the port delivers power but doesn’t transfer data, it could be an issue with the motherboard’s chipset or the USB controller. Check if other USB ports are functioning correctly.
  • Test the USB-C port with different devices to rule out device-specific issues.
  • 5.

Seek Expert Assistance:

  • If the problem persists, contact ASUS support for professional advice. They may provide insights specific to your motherboard model.
  • Consider reaching out to a local technician who can diagnose the problem hands-on.

Preventive Measures:

To prevent such issues in the future, it’s advisable to:

  • Regularly update your motherboard’s drivers and BIOS.
  • Avoid changing BIOS settings unless necessary and ensure you understand the implications of each setting.


USB-C port issues can be frustrating, especially when they disrupt your workflow. By methodically going through the troubleshooting steps, you can identify the root cause and find a solution. Remember, if you’re ever in doubt, professional support is just a call or message away.

For more detailed guidance, you can refer to ASUS’s official troubleshooting resources. If you find that other users have experienced similar issues, forums and community discussions can also offer valuable insights.

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