Troubleshooting; Audio Problems - Lenovo ThinkCentre M73 User Manual

Troubleshooting

Use the troubleshooting information to find solutions to problems that have definite symptoms.
If the symptom your computer is experiencing occurred immediately after you installed a new hardware
option or new software, do the following before referring to the troubleshooting information:
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 program 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 105
• "CD problems" on page 106
• "DVD problems" on page 107
• "Intermittent problems" on page 109
• "Keyboard, mouse, or pointing device problems" on page 109
• "Monitor problems" on page 111
• "Networking problems" on page 112
• "Option problems" on page 115
• "Performance and lockup problems" on page 116
• "Printer problems" on page 117
• "Serial port problems" on page 118
• "Software problems" on page 118
• "USB problems" on page 119

Audio problems

Select your symptom from the following list:
• "No audio in Windows" on page 105
• "An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive"
on page 106
• "Sound comes from one external speaker only" on page 106
• "No audio in DOS applications or games" on page 106
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.
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Chapter 10 Troubleshooting and diagnostics
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