Lenovo ThinkPad A22p ThinkPad A2* Series Hardware Maintenance Manual (October - Page 36

Power management, Screen blank mode, Standby mode - bios

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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 is powered off. v The CPU stops. To enter standby mode, press Fn + F4. Note: You can change the action of Fn + F4, if you are using the ACPI operating system. In certain circumstances, the computer goes into standby mode automatically: v If a "suspend time" has been set on the timer, and the user does not do any operation with the keyboard, the TrackPoint, the hard disk, the parallel connector, or the diskette drive within that time. 30 ThinkPad A20m/p, A21m/p, A22m/p

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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 is powered off.
v
The CPU stops.
To enter standby mode, press Fn + F4.
Note:
You can change the action of Fn + F4, if you are
using the ACPI operating system.
In certain circumstances, the computer goes into standby
mode automatically:
v
If a “suspend time” has been set on the timer, and the
user does not do any operation with the keyboard, the
TrackPoint, the hard disk, the parallel connector, or the
diskette drive within that time.
Related service information
30
ThinkPad A20m/p, A21m/p, A22m/p