Lenovo 28479WU Hardware Maintenance Manual - Page 48

Power management, Screen blank mode, Sleep mode, Hibernation mode, Symptom-to-FRU index

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9. Select Yes in the Setup Configuration window. Both user HDP and master HDP will have been removed. Power management To reduce power consumption, the computer has three power management modes: screen blank, sleep, and hibernation. Screen blank mode To put the computer into screen blank mode, do as follows: 1. Right-click the Power Manager Battery Gauge in the task bar. 2. Select Power off display. Sleep mode When the computer enters sleep mode, the following events occur in addition to what occurs in screen blank mode: • The LCD is powered off. • The hard disk drive is powered off. • The microprocessor stops. To enter sleep mode, do as follows: 1. Click Start. 2. Click the triangle mark on the right side of the Shut down icon; then select Sleep. To return from sleep mode, press the Fn key. Hibernation mode By using this mode, you can turn off your computer completely without saving files or exiting from any applications that are running. When you enter hibernation, all open applications, folders, and files are saved to the hard disk, and then the computer turns off. To enter hibernation mode, do as follows: 1. Click Start. 2. Click the triangle mark on the right side of the Shut down icon; then select Hibernate. To return from hibernation mode, press the power button for more than 4 seconds. Symptom-to-FRU index This section contains following information: • "Numeric error codes" on page 43 • "Error messages" on page 45 • "No-beep symptoms" on page 45 • "LCD-related symptoms" on page 45 • "Intermittent problems" on page 46 • "Undetermined problems" on page 46 The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most likely cause is listed first, in boldface type. 42 Hardware Maintenance Manual

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9. Select
Yes
in the Setup Configuration window. Both user HDP and master HDP will have been removed.
Power management
To reduce power consumption, the computer has three power management modes: screen blank, sleep,
and hibernation.
Screen blank mode
To put the computer into screen blank mode, do as follows:
1. Right-click the Power Manager Battery Gauge in the task bar.
2. Select
Power off display
.
Sleep mode
When the computer enters sleep mode, the following events occur in addition to what occurs in screen
blank mode:
•
The LCD is powered off.
•
The hard disk drive is powered off.
•
The microprocessor stops.
To enter sleep mode, do as follows:
1. Click
Start
.
2. Click the triangle mark on the right side of the
Shut down
icon; then select
Sleep
.
To return from sleep mode, press the Fn key.
Hibernation mode
By using this mode, you can turn off your computer completely without saving files or exiting from any
applications that are running. When you enter hibernation, all open applications, folders, and files are saved
to the hard disk, and then the computer turns off.
To enter hibernation mode, do as follows:
1. Click
Start
.
2. Click the triangle mark on the right side of the
Shut down
icon; then select
Hibernate
.
To return from hibernation mode, press the power button for more than 4 seconds.
Symptom-to-FRU index
This section contains following information:
•
“Numeric error codes” on page 43
•
“Error messages” on page 45
•
“No-beep symptoms” on page 45
•
“LCD-related symptoms” on page 45
•
“Intermittent problems” on page 46
•
“Undetermined problems” on page 46
The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most
likely cause is listed first, in boldface type.
42
Hardware Maintenance Manual