System Setup; Boot Menu; Boot Menu Enhancements - Dell OptiPlex 990 Service Manual

System Setup

System Setup
This computer offers you the following options:
• Access System Setup by pressing <F2>
• Bring up a one-time boot menu by pressing <F12>
Press <F2> to enter System Setup and make changes to the user-definable
settings. If you have trouble entering System Setup using this key, press <F2>
when the keyboard LEDs first flash.

Boot Menu

This feature gives users a quick and convenient mechanism to bypass the
System Setup-defined boot device order and boot directly to a specific device
(for example: floppy, CD-ROM, or hard drive).
Keystroke
<Ctrl><Alt><F8>
<F12>

Boot Menu Enhancements

The boot menu enhancements are as follows:
• Easier access — Although the <Ctrl><Alt><F8> keystroke still exists and can
be used to call up the menu, simply press <F12> during system boot to
access the menu.
• User prompting — Not only is the menu easy to access, when you are
prompted to use the keystroke on the BIOS splash screen (see image
below). The keystroke is not "hidden".
• Diagnostics options — The boot menu includes two diagnostic options, IDE
Drive Diagnostics (90/90 Hard Drive Diagnostics) and Boot to the Utility
Partition. The benefit here is that you do not have to remember the
<Ctrl><Alt><D> and <Ctrl><Alt><F10> keystrokes (although they still work).
NOTE: The BIOS features an option to disable either or both of the keystroke
prompts under the System Security / Post Hotkeys submenu.
Function
one-time boot and diagnostics utility menu
one-time boot and diagnostics utility menu
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