No POST Error 2-7 after Disabling the BIOS UEFI Certificate Authority Setting

Summary: The following article provides information about a diagnostic two Reds and seven Blues No Power-On Self-Test (POST) error On Alienware and G-Series laptops. The display failure error starts on the next boot after disabling the Unified Extensible Firmware Interface (UEFI) Certificate Authority (CA) setting in your laptops BIOS. ...

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Symptoms

Flashing the two Reds and seven Blues No POST error after disabling the UEFI CA BIOS setting

 

You may experience a black screen on your Alienware or G-Series gaming laptop. This error only occurs after changes in your BIOS. The laptop gives the following flashing start-up error on the next boot:

The Light Emitting Diodes (LED)s flash code group is two RED, and then seven BLUE flashes that repeat. That flash code advises the following error is seen:

SBIOS Message - Display Failure

The engineering team confirms that this happens after the following changes to the BIOS:

  1. You enter the BIOS setup screens using the F2 shortcut during start-up.

  2. Go to the BIOS UEFI CA setting and disable it.

  3. Confirm that the hybrid graphics or advanced Optimus mode is turned from ON to OFF. (This step is only for laptops with a discrete graphics card installed.)

  4. The Secure Boot setting is Enabled.

  5. Save your changes and Exit.

  6. Your laptop restarts and gives the No POST error.

Cause

There are many reasons why you may change your BIOS. However, after turning your laptop on with all the following BIOS settings changes in place the laptop cannot load the Video BIOS authentication key:

  • The UEFI CA BIOS is set to Disabled.
  • The Hybrid or Advanced mode is set to Disabled. (This only matters if a discrete video card is installed in the laptop.)
  • The Secure Boot is set to Enabled.

Resolution

These steps take you through how to recover your laptop from this error:

  1. Connect your AC Adapter to the laptop. Press and hold the power button down for 25 seconds. (You must reset the Real-Time-Clock (RTC).)

  2. When the laptop restarts, use the F2 key shortcut to boot into the BIOS setup screens.

    Intel BIOS Setup Screen

  3. Go to the Boot Configuration screen and enable the Microsoft UEFI CA option.

    Intel Enable Microsoft UEFI CA

    AMD Enable Microsoft UEFI CA

  4. Save the changes and Exit.

  5. Confirm that your laptop boots to the operating system.


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Affected Products

Alienware m15 Ryzen Edition R5, Alienware m15 R7 AMD, Alienware m15 R7, Alienware m16 R1 AMD, Alienware m16 R1, Alienware m16 R2, Alienware m18 R1 AMD, Alienware m18 R1, Alienware m18 R2, Alienware x14, Alienware x14 R2, Alienware x16 R1 , Alienware x16 R2, Dell G15 5510, Dell G15 5511, Dell G15 5515 Ryzen Edition, Dell G15 5520, Dell G15 5521 Special Edition, Dell G15 5525, Dell G15 5530, Dell G15 5535, Dell G16 7620, Dell G16 7630 ...
Article Properties
Article Number: 000225008
Article Type: Solution
Last Modified: 17 Feb 2025
Version:  4
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