Lenovo ThinkPad L530 (English) User Guide - Page 157
Fingerprint reader problems, Battery and power problems, Battery problems - charger
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• 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 on the Volume Mixer window. Solution: Use the hardware volume 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 and select Mute speakers. • Problem: When you connect a headphone to your computer while playing sound, a speaker does not produce sound in the MULTI-STREAM mode at Realtek HD Audio Manager. 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. The procedure is as follows: 1. Click Start ➙ Control Panel ➙ All Control Panel Items 2. Click the Realtek HD Audio Manager icon. The Realtek HD Audio Manager window opens. 3. Look at the playback devices. If you have attached a headphone, the headphone will be automatically set as the default device, and the icon for that headphone will be checked. 4. To set a different device as the default, just double-click the icon for those speakers. That icon will now have a check mark. 5. Play any sound by use of a music program such as Windows Media Player. Ensure that sound comes from the speakers. 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 55. Battery and power problems This section tells what to do if you have battery and power problems. Battery problems • Problem: The battery pack cannot be fully charged in the standard charge time when the computer is powered off. Solution: The battery pack might be over-discharged. Do the following: 1. Turn off the computer. 2. Ensure that the over-discharged battery pack 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 pack. Chapter 10. Troubleshooting computer problems 139