No boot device found when you change the Boot sequence to Legacy mode

No boot device found when you change the Boot sequence to Legacy mode



This article addresses a "No boot device found" issue affecting XPS 12-9250, 12-7275, Latitude 3490/3590, 7280, 7480, 5280, 5480, 5580, Precision 3520, Optiplex 7760, 7460, 7060, 5260, 5060, 3060, 5060 AIO (and later systems) when changing the Boot Sequence to Legacy mode in the BIOS setup menu.


No Boot Device Found

XPS 12-9250, 12-7275, Latitude 3490/3590, 7280, 7480, 5280, 5480, 5580, Precision 3520, Optiplex 7760, 7460, 7060, 5260, 5060, 3060, 5060 AIO (and later systems) report "No boot device found" when you change the Boot Sequence to Legacy mode in BIOS setup menu.

No boot device found

These specific systems are based on the 7th generation Kaby lake processor (and above) and are designed to boot exclusively in the Unified Extensible Firmware Interface (UEFI) boot environment. As a result, if legacy boot mode is selected, the system will not boot.

NOTE: This situation applies to any system from the Kaby lake 7th generation processor forward and is not limited to the systems that this article was originally based on.




Return the BIOS to UEFI Boot

You can resolve this issue by returning the system to the UEFI boot mode.

  1. From a power off state, power on the system and Press F2 boot into BIOS setup menu.
  2. Choice "Boot sequence" and change the option from "Legacy" to "UEFI" then press "Apply" on the right-down corner.

    boot sequence

  3. Choice "Advance Boot options" and disable "Enable Legacy Operation ROMs" then press "Apply" on the right-down corner.

     disable “Enable Legacy Operation ROMs”

  4. Choice "Secure Boot" -> "Secure Boot Enable" and change the option from "Disabled to Enabled", then press "Apply" on the right-down corner.

    “Disabled to Enabled”

  5. Press "Exit" on the right-down corner and wait the system reboot.

Additional Information:



Article ID: SLN301692

Last Date Modified: 07/09/2019 11:55 AM


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