Fingerprint Reader Problems - Lenovo ThinkPad P71 User Manual

Solution: To switch from one device to another (for example, from a speaker to a headphone, or from an
external microphone to a built-in microphone), do the following:
1. Go to Control Panel, and ensure that you view Control Panel by Category.
2. Click Hardware and Sound.
3. Click the Realtek HD Audio Manager icon.
4. Ensure that the computer is in MULTI-STREAM mode in the Device advanced settings window.
5. In the Volume Mixer window, select the device you want, for example, speakers.
6. Play any sound through a music program (for example, Windows Media Player). Ensure that sound
comes from the speakers now.
7. Then, if you would like to switch to a headphone, close the music program.
8. Go to the Volume Mixer window. Then select another device (for example, the headphone).
9. Play any sound through the music program. Ensure that sound comes from the headphone attached
directly to the system. For more information, see the help information system of the Realtek HD Audio
Manager program.
Note: The Volume Mixer window of Realtek HD Audio Manager displays all audio devices detected
in the system, such as speakers for a playback device, or a built-in microphone for a recording
device. A check mark beside the audio device shows that the device has been selected.

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 48.
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. Connect the ac power adapter to the computer and let it
charge. 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.
Solution: Fully discharge and recharge the battery for two times. If the problem persists, use a new
battery.
• Problem: The operating time for a fully charged battery is short.
Solution: Fully discharge and recharge the battery for two times. If the problem persists, use a new
battery.
• Problem: I cannot turn on my computer with a fully charged battery.
Solution: Do the following:
1. Press and hold the power button for four seconds or more to reset the computer.
2. If the system still does not respond, remove the ac power adapter and the battery.
3. Reconnect the ac power adapter, and then turn on the computer.
• Problem: The battery cannot get charged.
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Chapter 8 Troubleshooting computer problems
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