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Latitude 5540 Owner's Manual

F12 One Time Boot menu

To enter the 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 F12 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 System Setup.


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