PC not turning after enabling Secure boot and TPM.

Troubleshooting a Non-Responsive PC After Enabling Secure Boot and TPM

Enabling Secure Boot and Trusted Platform Module (TPM) is often a necessary step for enhanced security features, especially when preparing a system for modern gaming or operating system updates. However, users may encounter unexpected boot issues afterward. Here, we’ll explore common causes and solutions based on real-world scenarios, such as a recent case with a Gigabyte Aorus motherboard.

Understanding the Issue

In this scenario, a user aimed to enable Secure Boot to play a demanding game, Battlefield 2042. They verified that their storage device used the GPT partition scheme, which is compatible with Secure Boot. Unfortunately, after enabling Secure Boot in the BIOS, the PC failed to display any output on the screen. The motherboard’s diagnostic LED indicator flashed between CPU and VGA, signaling a hardware or configuration problem.

Potential Causes

1. Secure Boot Compatibility: Not all hardware configurations support Secure Boot seamlessly, especially if the system’s existing OS or firmware settings are incompatible.
2. BIOS Configuration: Incorrect or incomplete BIOS settings can prevent the system from booting properly.
3. UEFI vs. Legacy Boot Modes: Switching modes without proper configuration can lead to boot failures.
4. Video Output Issues: Changes in boot settings may impact how graphics hardware initializes.
5. Hardware Loosening or Damage: Physical connections or hardware faults can be exacerbated during BIOS changes.

Recommended Troubleshooting Steps

1. Reset BIOS Settings:
2. Power off the computer completely.
3. Remove the power cable and press the power button for several seconds to discharge residual power.
4. Open the case and locate the CMOS jumper or remove the CMOS battery as per the motherboard manual.

5. Reset BIOS settings to default, then reconfigure settings carefully.

6. Verify BIOS Post-Reset:

7. After resetting, attempt to boot the system with minimal hardware (e.g., integrated graphics if available, disconnect other peripherals).

8. Check if the display output returns.

9. Disable Secure Boot:

10. Enter BIOS during startup (usually by pressing Del or F2).
11. Find the Secure Boot setting and disable it temporarily.

12. Save changes and restart to see if the system boots normally.

13. Check UEFI/Legacy Settings:

14. Ensure the boot mode matches your OS installation (UEFI preferred for GPT disks).

15. Confirm that Secure Boot is enabled in UEFI mode if needed.

16. Update BIOS Firmware:

17. Visit the motherboard