Lenovo P70, User Manual

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• Problem : The volume sliders do not stay in place when some audio applications are used.
Solution : It is normal for the sliders to change position when certain sound applications are used. The
applications are aware of the settings in the Volume Mixer window and are allowed to change the settings
themselves. An example is the Windows Media Player. Usually the application has sliders available to
control the sound from within the program.
• Problem : The balance slider cannot completely mute one channel.
Solution : The control is designed to compensate for minor differences in balance and does not
completely mute either channel.
• Problem : There is no volume control for MIDI sound in the Volume Mixer window.
Solution : Use the hardware volume control. This is because the built-in synthesizer software does not
support the control.
• Problem : The sound cannot be turned off even if you set the Master volume control at minimum.
Solution : You still can hear some sound even though you have set the Master volume control at minimum.
To turn off the sound completely, go to the Master volume control and select Mute Speaker/HP .
• Problem : When you connect headphones to your computer while playing sound, a speaker does not
produce sound.
Solution : Once the headphones are attached, the streaming is automatically redirected to it. If you want
to listen to sound from the speakers again, be sure to set those speakers as the default device. For
details, refer to the help information system for Realtek HD Audio Manager.
Fingerprint reader problems
• Problem : The surface of the reader is dirty, stained, or wet.
Solution : Gently clean the surface of the reader with a dry, soft, lint-free cloth.
• Problem : The reader often fails to enroll or authenticate your fingerprint.
Solution : If the surface of the reader is dirty, stained, or wet, gently clean the surface of the reader with a
dry, soft, lint-free cloth.
For tips on how to maintain the fingerprint reader, refer to “Maintaining the fingerprint reader” on page 56.
Battery and power problems
This topic contains instructions on troubleshooting battery and power problems.
Battery problems
• Problem : The battery cannot be fully charged in the standard charge time when the computer is powered
off.
Solution : The battery might be over-discharged. Do the following:
1. Turn off the computer.
2. Make sure that the over-discharged battery is in the computer.
3. Connect the ac power adapter to the computer and let it charge.
If a quick charger is available, use it to charge the over-discharged battery.
If the battery cannot be fully charged in 24 hours, use a new battery.
• Problem : The computer shuts down before the battery status icon shows that the battery is empty, or the
computer operates after the battery status icon shows that the battery is empty.
Chapter 8
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Troubleshooting computer problems
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