1. Hold down the [Del] key while booting the thin client to open the UEFI setup.
  2. Navigate to the Boot section using the arrow keys. Enable Boot > Onboard LAN Boot ROM and select PXE as Boot Option #1.
  3. Press [F4] to save your settings, exit setup and reboot.

    UEFI Setup

  4. Press [F12] when you are prompted to confirm booting of the image.