Lenovo 019923U, 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.
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Hardware Maintenance Manual