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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 completely even if you set the master volume control at
minimum.
Solution: You can still 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 window and select Mute speakers.
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 ngerprint.
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.
If your nger has any of the following conditions, you might not be able to register or authenticate it:
– Your nger is wrinkled.
– Your nger is rough, dry, or injured.
– Your nger is very dry.
– Your nger is stained with dirt, mud, or oil.
– The surface of your nger is very different from when you enrolled your ngerprint.
– Your nger is wet.
– A nger that has not been enrolled is used.
To improve the situation, try the following:
– Clean or wipe your hands to remove any excess dirt or moisture from the ngers.
– Enroll and use a different nger for authentication.
– If your hands are too dry, apply lotion to them.
Battery and power problems
This section tells what to do if you have a battery and power problem.
This section includes ve topics: Battery, ac power adapter, Power, Power button, Startup and Sleep and
hibernation. Check these topics to nd the related information.
Battery problems
Problem: The battery pack cannot be fully charged by the power-off method in the standard charge
time for your computer.
Solution: The battery pack might be over-discharged. Do the following:
1. Turn off the computer.
2. Make sure that the over-discharged battery pack is in the computer.
3. Connect the ac power adapter to the computer and let it charge.
Chapter 9. Troubleshooting computer problems 127