Lenovo ThinkPad E555 User Manual page 91

The following table lists the Startup menu items. Default values are in boldface.
Note: Some items are displayed on the menu only if the computer supports the corresponding features.
Table 5. Startup menu items
Menu item
Boot
Network Boot
UEFI/Legacy Boot
Boot Mode
Option Key Display
Selection
• Both
• UEFI Only
• Legacy Only
UEFI/Legacy Boot Priority
• UEFI First
• Legacy First
CSM Support (for UEFI Only)
• No
• Yes
• Quick
• Diagnostics
• Disabled
• Enabled
Comments
Select the boot device when you
press the power button to turn on the
computer.
Select the boot device when the
computer wakes from LAN. If Wake
On LAN is enabled, a network
administrator can turn on all of the
computers in a LAN remotely by use
of network management software.
Select system boot capability.
• Both: Select priority of boot
options between UEFI and Legacy.
• UEFI Only: The computer will start
from the UEFI-enabled operating
system.
• Legacy Only: The computer will
boot from any operating system
other than the UEFI-enabled one.
Note: If you select UEFI Only, the
computer cannot start from the
bootable devices that do not have the
UEFI-enabled operating system.
Compatibility Support Module (CSM)
is required for starting the legacy
operating system. If you select UEFI
Only, CSM Support is selectable.
For Both or Legacy Only mode, CSM
Support is not selectable.
Screen during the POST:
• Quick: The ThinkPad Logo screen
is displayed.
• Diagnostics: Test messages are
displayed.
Note: You can also enter Diagnostic
mode by pressing Esc during POST.
If you select Disabled, then the
message "To interrupt normal startup,
press Enter" is not displayed during
the POST.
.
Chapter 6 Advanced configuration
75