Bios Overview; Entering The Bios Setup Program; Boot Menu; Boot Menu Enhancements - Dell INSPIRON 15 5000 Series Service Manual

BIOS overview

The BIOS manages data flow between the computer's operating system and
attached devices such as the hard disk, video adapter, keyboard, mouse, and
printer.

Entering the BIOS setup program

1 Turn on or restart your computer.
2 Press F2 when the Dell logo is displayed on the screen to enter the BIOS
setup program.
You can change the user-definable settings in BIOS setup program.

Boot menu

The Inspiron 15-5568 includes a one-time boot menu. By using this feature,
you can change the sequence of devices that your computer attempts to
boot from, for example, floppy, CD-ROM, or hard drive.

Boot menu enhancements

The boot menu enhancements are as follows:
• Easier Access — Press F12 to access the boot selection menu.
• User Prompting — The user is prompted to use the keystroke on the BIOS
screen.
• Diagnostics Options — The boot menu includes the ePSA diagnostic
options.

Timing key sequences

The keyboard is not the first device initialized by Setup. As a result, if you press
a keystroke too early, the keyboard is locked out. In such case, a keyboard
error message is displayed on the screen, and you cannot restart your
computer with the Ctrl+Alt+Del key combination.
To prevent the keyboard from locking, wait until the keyboard is initialized
completely. The keyboard is initialized if one of the following occurs:
• The keyboard lights flash.
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