Power Management Features - IBM ThinkPad 340 Series Hardware Maintenance Manual

Note: Removing and installing the battery pack
during suspend mode should be done within one
minute. The resume operation must start. If the
resume operation does not work, switching of power
from the battery pack to standby battery will not be
correct. Replace the DC/DC card.
If replacing the DC/DC card does not resolve the
problem, replace the system board.

Power Management Features

Three power management modes are provided by the
computer to save power consumption and prolong battery
power.
Standby Mode:
occurs:
The LCD backlight turns off.
The hard disk motor stops.
Events that cause the computer to enter the standby
mode.
Standby requested by the Fn key. (Fn+F3)
No activity under auto-standby enabled by the
feature utility.
Events that cause the computer to exit the standby mode
(resume).
Any key operation.
Suspend Mode:
following occur:
The LCD backlight turns off.
The LCD power is powered-off.
The hard disk is powered-off.
The CPU is stopped.
In the ThinkPad Features Program, the computer can be
set to "Will not suspend even if LCD is closed."
When the computer is powered with ac power and is used
with one of the following IBM PC cards, the computer can
enter the standby mode only. The PC card and application
program remain active.
3270 Emulation Credit Card Adapter
5250 Emulation Credit Card Adapter
Token-Ring 16/4 Credit Card Adapter
Credit Card Adapter for Ethernet
Events that prevent the computer from entering the
suspend mode.
While the communication link is running.
When a pointing device (except a serial mouse) are
selected in the Config menu of the Easy-Setup.
ThinkPad 755CE, 755CSE, 755CV, 755CX (9545)
When in standby mode the following
When in suspend mode, the
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