IBM L40 SX Quick Reference page 72

Managing Power Usage
Key Purpose
Internal Device Power Off Time
5
Automatically turns off internal devices
and system power if no keyboard input
or other device activity occurs in a
specified time.
Fixed disk power is turned on when the
system attempts to read or write to the
fixed disk.
Pressing any key causes the display
10 turn on again; however, that
keystroke is accepted by the system
as input.
System power is resumed only when
the display is lowered and raised. See
page 41.
Other internal devices such as diskette
drive automatically turn off when not in
use. No action is required by you to
turn these devices on or off.
System Speed
6
Minimizes power usage by changing
the processing speed.
You can specify two values, one for
the
Auto (automatic) mode, the other for
the Manual (manual) mode.
The value for the Auto mode becomes
effective when the economy switch is
set to A, the value for the Manual
mode becomes effective when the
economy switch is set to M.
Operating Your Computer
Option
Display off after:
Fixed disk off after:
System power off after:
Note: If 0 is specified,
Auto:
Note: If you select High
Manual:
Note: If you use the
60
10 (1 through 20) mins
5 (1 through 20) mins
20 (1 through 20) mins
no automatic power-
off is assumed.
High Performance
Long Battery Life
Performance, use of
the AC adapter is
recommended.
20 MHz
10 MHz
5 MHz
serial port at a
line speed of above
9600 bps, to avoid
data loss, it is
recommended that 20
MHz be specified.