IBM 1400 (2611) Power Management Features, Screen Blanking Mode, Standby Mode

Power Management Features
Two power management modes are available in the com-
puter system to reduce power consumption and to prolong
battery life.
Screen Blanking Mode
When in screen blanking mode, the following occurs:
The LCD backlight turns off.
Events that cause the computer to enter screen blanking
mode:
Screen blanking requested by the Fn key (Fn+F3).
Standby Mode
When in standby mode, the following occurs:
The LCD backlight turns off.
The hard disk motor stops.
Processor stops the clock.
Events that cause the computer to enter standby mode:
Note: The standby mode indicator turns on when system
is in standby mode.
Standby requested by the Fn key (Fn+F4).
The LCD is closed (if the "Will not Enter Standby
Even if the Lid is Closed" parameter in the Power
Management menu of the BIOS Utility is set to
"Enabled").
The system (keyboard, mouse, hard disk drive, par-
allel connector, or diskette drive, etc.) is idle for a
certain period of time.
The battery power is critically-low. The "Sleep upon
Battery-low" in the Power Management menu of the
BIOS Utility is set to "Enabled". Sleep Manager is not
installed and the hibernation file is not present or
invalid.
Note: Before entering standby mode, if "Battery-low
Warning Beep" in the Power Management menu of
the BIOS Utility is set to "Enabled", four short
beeps will be issued every minute for three
minutes. If a powered AC Adapter is not attached,
then the beeps will be continuously issued every
minute until the system shuts down.
Events that cause the computer to exit standby mode:
The LCD is opened (if the system entered standby
mode from closing the lid).
A serial or PCMCIA device signals the modem ring
indicator (RI).
Any key or pointing device operation.
120 ThinkPad i Series 1400 HMM