Power Management - IBM ThinkPad A22e Hardware Maintenance Manual

Power management

To reduce power consumption, the computer has three
power management modes: screen blank, standby, and
hibernation.
Notes
v Screen blank mode is called standby mode in
Windows 95 and Windows NT.
v Standby mode is called suspend mode in
Windows 95 and Windows NT.
Screen blank mode
Screen blank mode has three variants, as follows:
1. If you press Fn + F3, or the time set on the "LCD off
timer" in IBM BIOS Setup Utility expires,
v The LCD backlight turns off.
v The hard-disk drive motor stops.
v The speaker is muted.
2. If you are using the ACPI operating system and you
press Fn + F3,
v The LCD backlight turns off.
v The hard-disk drive motor stops.
3. If the time set on the "Turn off monitor" timer in the
operating system expires,
v The LCD backlight turns off.
To end screen blank mode and resume normal operation,
press any key.
Standby mode
When the computer enters standby mode, the following
events occur in addition to what occurs in screen blank
mode:
v The LCD is powered off.
v The hard-disk drive motor stops in models listed below.
A21e series
A22e series
i 1800 series
v The hard-disk drive is powered off in models listed
below.
A22e series
28
ThinkPad A21e, A22e, i 1800 (MT 2655/2663/2664)
MT2655-21x, 22x, 23x, 31x, 32x, 33x, 41x,
42x, 43x, 71x, 72x, 73x, 81x, 82x, 83x, 91x,
92x, 93x, B2x, B4x
MT2655-25x, 26x, 27x, 35x, 36x, 37x, 75x,
76x, 77x, 85x, 86x, 87x, MT2663-77x,,
MT2664-77x
MT2655-P3J
MT2655-45x, 46x, 47x, 55x, 56x, 57x, 65x,
66x, 67x, 95x, 96x, 97x, A5x, A6x, A7x, B5x,
B6x, B7x
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