Fingerprint Reader Problems; Battery And Power Problems - Lenovo ThinkPad X1 Carbon User Manual

Solution: It is normal for the sliders to change position when certain sound programs are used. The
programs 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 program 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: The sound cannot be turned off completely even if you set the Master volume control at
minimum.
Solution: You still can hear some sound even though you have set the Volume Mixer control at minimum.
To turn off the sound completely, press the system-status button.
• Problem: When you connect a headphone to your computer while playing sound, a speaker does not
produce sound.
Solution: Once the headphone is 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 more
information, see the help information system for Realtek HD Audio.

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, see "Using the fingerprint reader" on page 61.

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. 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 batteries.
If the battery cannot be fully charged in 24 hours, call Lenovo Customer Service Center to have it serviced.
• Problem: Your computer shuts down before the battery-status icon shows empty, or your computer
operates after the battery-status icon shows empty.
Solution: Discharge and recharge the battery.
• Problem: The operating time for fully charged battery is short.
Solution: Discharge and recharge the battery. If your battery operating time is still short, call Lenovo
Customer Service Center to have it serviced.
• Problem: The computer does not operate with fully charged battery.
Solution: The surge protector in the battery might be active. Turn off the computer for one minute to reset
the protector; then turn on the computer again.
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Chapter 10 Troubleshooting computer problems
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