SOLVED: Dell Latitude 7400 Will Not PXE Boot

Dell 7400 2in1If you have a Dell 7400 (including the 2 in 1 model) you may find PXE book is not an option in the BIOS / UEFI.  Fortunately this can be resolved:

  1. Boot into the BIOS /UEFI by pressing F12 repeatedly at boot up and then click BIOS SETUP
  2. Enable General > Advanced Boot Options > UEFI Network Stack
  3. Enable System Configuration > Thunderbolt Adapter Configuration > Thunderbolt Boot Support
  4. Enable both Thunderbolt & Thunderbolt (and PCIe behind TBT) Pre-boot Modules
  5. Set POST Behavior > Fastboot > Set to Thorough
  6. Disable Secure Boot > Secure Boot Enable (i.e. uncheck)

Items 5 and 6 may not be required but I have found several people say they are in different forums, so that is what I do now.

The Dock Also Makes A Difference

Dell WD15 DockAlso, if you are trying to PXE Boot from a Dell D6000 or a D3100, give up now.  Those docks MIGHT PXE boot, but Jesse in Dell’s tech support group tells me they are not supported for PXE boot and I personally could not get them to work.

Dell supports (and I have successfully used) the Dell WD15 dock to PXE boot a Dell Latitude 2 in 1 laptop.

I have also read (but not seen myself) the same problems with the Dell Latitude 7300 and presumably these instructions will work for it too.



  1. Avatar
    Paul Jackson March 3, 2020 at 4:56 am

    I can confirm these steps work for the 7300 as well, there was no need to change steps 4/5.

    Thank you for taking the time to put this out there

  2. Avatar
    Rossi October 21, 2019 at 8:23 am

    I tried all of this on the Latitude 7300, and it did not work. 🙁

Questions or Comments?