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Dell Precision 5520 Owner's Manual

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One time boot menu

To enter one time boot menu, turn on your computer, and then press F12 immediately.
NOTE It is recommended to shutdown the computer if it is on.

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

  • Removable Drive (if available)
  • STXXXX Drive (if available)
    NOTE XXX denotes the SATA drive number.
  • Optical Drive (if available)
  • SATA Hard Drive (if available)
  • Diagnostics

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

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