Audio Problems - Lenovo ThinkCentre M71e 3166 User Manual

1. Remove the new hardware option or software. If you must remove the computer cover to remove a
hardware option, make sure you review and follow the electrical safety information provided with your
computer. For your safety, do not operate the computer with the cover removed.
2. Run the diagnostic programs to ensure your computer is operating correctly.
3. Reinstall the new hardware option or software following the manufacturer's instructions.
Select the problem your computer is experiencing from the following list:
• "Audio problems" on page 85
• "CD problems" on page 86
• "DVD problems" on page 87
• "Intermittent problems" on page 89
• "Keyboard, mouse, or pointing device problems" on page 89
• "Monitor problems" on page 91
• "Networking problems" on page 92
• "Option problems" on page 95
• "Performance and lockup problems" on page 96
• "Printer problems" on page 98
• "Serial port problems" on page 99
• "Software problems" on page 99
• "USB problems" on page 100

Audio problems

Select your symptom from the following list:
• "No audio in Windows" on page 85
• "An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive"
on page 86
• "Sound comes from one external speaker only" on page 86
• "No audio in DOS applications or games" on page 86
No audio in Windows
Symptom: No audio in Windows
Actions:
• If you are using powered external speakers that have an On/Off control, verify that the On/Off control is
set to the On position and the speaker power cable is connected to a properly grounded, functional ac
electrical outlet.
• If your external speakers have a volume control, verify that the volume control is not set too low.
• Double-click the speaker icon in the Windows notification area. A master volume-control window opens.
Verify that the Mute settings are not checked and none of the volume settings is set too low.
• Some models have a front audio panel you can use to adjust volume. If you have a front audio panel,
verify that the volume is not set too low.
• Verify that your external speakers (and headphones, if used) are connected to the correct audio connector
on the computer. Most speaker cables are color-coded to match the connector.
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Chapter 10 Troubleshooting and diagnostics
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