Audio Problems; Power Management Problems; Resolving A Low Battery Level; Resolving A Low Battery Level When External Power Is Available - HP 455 User Manual

Audio problems

To check the audio functions on your computer, follow these steps:
1. Select Start > Control Panel > Hardware and Sound > Sound.
2. When the Sound window opens, click the Sounds tab. Under Program Events, select any sound
event, such as a beep or alarm, and click the Test button.
You should hear sound through the speakers or through connected headphones.
To check the recording functions on your computer, follow these steps:
1. Select Start > All Programs > Accessories > Sound Recorder.
2. Click Start Recording and speak into the microphone. Save the file to your desktop.
3. Open a multimedia program and play back the sound.
To confirm or change the audio settings on your computer, select Start > Control Panel > Hardware
and Sound > Sound.

Power management problems

Some possible causes for power management problems include the following:
●
Low battery levels
●
AC adapter problems

Resolving a low battery level

Resolving a low battery level when external power is available

●
Connect an AC adapter.
●
Connect an optional docking or expansion device.
●
Connect an optional power adapter purchased as an accessory from HP.

Resolving a low battery level when no power source is available

●
Initiate Hibernation.
●
Save your work and shut down the computer.

Resolving a low battery level when the computer cannot exit Hibernation

When the computer lacks sufficient power to exit Hibernation, follow these steps:
1. Replace the discharged user-replaceable battery with a charged battery, or connect the AC
adapter to the computer and to external power.
2. Exit Hibernation by pressing the power button.
84 Chapter 13 Troubleshooting and support