Updating Your System Bios - Lenovo ThinkPad L420 User Manual

Table 5. Security menu items (continued)
Function
Computrace
Computrace Module Activation
Startup menu items
Table 6. Startup menu items
Function
Boot Refer to "Startup menu" on page 140.
Network Refer to "Startup menu" on page 140.
Boot Mode
Option Keys Display
Boot Device List F12 Option

Updating your system BIOS

The basic input/output system (BIOS) is a part of the system programs that make up the basic layer of
software built into your computer. BIOS translates the instructions from other software layers.
Your computer system board has a module called electrically erasable programmable read-only memory
(EEPROM, also referred to as flash memory). You can update BIOS and the Configuration/Setup Utility
148
User Guide
Selection
• Enabled
• Disabled
• Permanently Disabled
Selection
• Quick
• Diagnostics
Note: You can also enter
the "Diagnostic" mode by
pressing Esc during POST.
• Enabled
• Disabled
• Enabled
• Disabled
Comments
Enables or disables the BIOS interface to activate
Computrace module. Computrace is an optional
monitoring service from Absolute Software.
Note: If you set the Computrace module activation
to "Permanently Disabled," you will be unable to
enable this setting again.
Comments
Screen during POST:
• Quick: ThinkPad Logo screen is displayed.
• Diagnostics: Test messages are displayed.
Beep at POST completion:
• Quick: No. Sound on error case only
• Diagnostics: Yes. Always sounds.
"Ctrl-S" prompt for on-board Ethernet:
• Quick: No.
• Diagnostics: Yes.
Memory testing during POST:
• Quick: Quick test (or no test).
• Diagnostics: Full test.
Testing other devices during POST:
• Quick: Minimum test (or no test).
• Diagnostics: Can perform necessary testing for
critical devices
If you select "Disabled," the "To interrupt normal
startup, press the blue button." message is not
displayed during POST.
If you select "Enabled," the F12 key is recognized
and the Boot Menu is displayed.