Dell Precision Tower 3420 Owner's Manual

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Boot Sequence

Boot Sequence allows you to bypass the System Setup‐defined boot device order and boot directly to a specific device (for example: optical drive or hard drive). During the Power-on Self Test (POST), when the Dell logo appears, you can:
  • Access System Setup by pressing F2 key
  • Bring up the one-time boot menu by pressing F12 key

The one-time boot menu displays the devices that you can boot from including the diagnostic option. The boot-menu options are:

Table 1. Boot SequenceThis section explains you Boot Sequence.
Option Description
Legacy Boot
  • ST2000DM001–1ER164
  • CD/DVD/CD-RW Drive
  • Onboard NIC
UEFI Boot Windows Boot Manager
Other options
  • BIOS Setup
  • BIOS Flash Update
  • Diagnostics
  • Intel (R) Management Engine BIOS Extension (MEBx)
  • Change Boot Mode Settings

The boot sequence screen also displays the option to access the System Setup screen.

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