IBM L40 SX, Quick Reference

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Operating Your Computer 60
Key Purpose Option
Internal Device Power Off Time
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.
Display off after:
10 (1 through 20) mins
Fixed disk off after:
5 (1 through 20) mins
System power off after:
20 (1 through 20) mins
Note: If 0 is specified,
no automatic power-
off is assumed.
System Speed
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 .
Auto:
High Performance
Long Battery Life
Note: If you select High
Performance, use of
the AC adapter is
recommended.
Manual:
20 MHz
10 MHz
5 MHz
Note: If you use the
serial port at a
line speed of above
9600 bps, to avoid
data loss, it is
recommended that 20
MHz be specified.
Managing Power Usage
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