User Guide - Windows 7

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If the power lights turn on, the AC adapter is working properly.
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If the power lights remain o, check the connection from the AC adapter to the computer and the
connection from the power cord to the AC outlet to be sure that the connections are secure.
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If the connections are secure and the power lights remain o, the AC adapter is not functioning and
should be replaced.
Contact support for information about obtaining a replacement AC power adapter.
Shutting down the computer
CAUTION: Unsaved information is lost when the computer shuts down.
The Shut down command closes all open programs, including the operating system, and then turns o the
display and computer.
Shut down the computer under any of the following conditions:
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When you need to replace the battery or access components inside the computer
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When you are connecting an external hardware device that does not connect to a USB or video port
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When the computer will be unused and disconnected from external power for an extended period
Although you can shut down the computer with the power button, the recommended procedure is to use the
Windows Shut down command:
NOTE: If the computer is in the Sleep state or in Hibernation, you must rst exit Sleep or Hibernation before
shutdown is possible.
1. Save your work and close all open programs.
2. Select Start > Shut down.
If the computer is unresponsive and you are unable to use the preceding shutdown procedures, try the
following emergency procedures in the sequence provided:
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Press ctrl+alt+delete, and then click the Shut down icon on the display.
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Press and hold the power button for at least 5 seconds.
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Disconnect the computer from external power.
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On models with a user-replaceable battery, remove the battery.
46 Chapter 7 Managing power