Lenovo ThinkPad A21e TP A21e, A22e Hardware Maintenance Manual (June 2001) - Page 32

Power management, Screen blank mode, Standby mode

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Power management Related service information 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 MT2655-21x, 22x, 23x, 31x, 32x, 33x, 41x, 42x, 43x, 71x, 72x, 73x, 81x, 82x, 83x, 91x, 92x, 93x, B2x, B4x A22e series MT2655-25x, 26x, 27x, 35x, 36x, 37x, 75x, 76x, 77x, 85x, 86x, 87x, MT2663-77x,, MT2664-77x i 1800 series MT2655-P3J v The hard-disk drive is powered off in models listed below. A22e series MT2655-45x, 46x, 47x, 55x, 56x, 57x, 65x, 66x, 67x, 95x, 96x, 97x, A5x, A6x, A7x, B5x, B6x, B7x 28 ThinkPad A21e, A22e, i 1800 (MT 2655/2663/2664)

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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
MT2655-21x, 22x, 23x, 31x, 32x, 33x, 41x,
42x, 43x, 71x, 72x, 73x, 81x, 82x, 83x, 91x,
92x, 93x, B2x, B4x
A22e series
MT2655-25x, 26x, 27x, 35x, 36x, 37x, 75x,
76x, 77x, 85x, 86x, 87x, MT2663-77x,,
MT2664-77x
i 1800 series
MT2655-P3J
v
The hard-disk drive is powered off in models listed
below.
A22e series
MT2655-45x, 46x, 47x, 55x, 56x, 57x, 65x,
66x, 67x, 95x, 96x, 97x, A5x, A6x, A7x, B5x,
B6x, B7x
Related service information
28
ThinkPad A21e, A22e, i 1800 (MT 2655/2663/2664)