HP EliteBook 8740w Mobile Workstation - Manual (Page 78)

Replacing the battery
Computer battery life varies, depending on the power management settings, programs running on the
computer, display brightness, external devices connected to the computer, and other factors.
Battery Check notifies you to replace the battery when an internal cell is not charging properly, or when
the battery storage capacity has reached a “weak” condition. A message refers you to the HP Web site
for more information about ordering a replacement battery. If the battery is possibly covered by an HP
warranty, instructions include a warranty ID.
NOTE: To ensure that you always have battery power when you need it, HP recommends purchasing
a new battery when the storage capacity indicator turns green-yellow.
Testing an AC adapter
Test the AC adapter if the computer exhibits any of the following symptoms:
● The computer will not turn on when connected to the AC adapter.
● The display does not turn on when the computer is connected to the AC adapter and external
power.
● The power lights are off when the computer is connected to the AC adapter.
To test the AC adapter:
1. Remove the battery from the computer.
2. Connect the AC adapter to the computer and to an AC outlet.
3. Turn on the computer.
● If the power lights turn on, the AC adapter is functioning properly.
● If the power lights remain off, the AC adapter is not functioning and should be replaced.
Contact technical support for information on obtaining a replacement AC power adapter. Select
Start > Help and Support > Contact support.
Shutting down the computer
CAUTION: Unsaved information will be lost when the computer is shut down.
The Shut Down command closes all open programs, including the operating system, and then turns off
the display and computer.
Shut down the computer under any of the following conditions:
● When you need to replace the battery or access components inside the computer
● When you are connecting an external hardware device that does not connect to a USB port
● When the computer will be unused and disconnected from external power for an extended period
To shut down the computer, follow these steps:
NOTE: If the computer is in Standby or in Hibernation, you must first exit Standby or Hibernation before
shutdown is possible.
1. Save your work and close all open programs.
2. Select Start > Turn Off Computer > Turn Off.
66 Chapter 5 Power management