Troubleshooting; Audio Problems - Lenovo ThinkCentre Edge 91z Hardware Maintenance 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 a new hardware option or new
software installed, 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, have the computer serviced. 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.
Select the problem your computer is experiencing from the following list:
• "Audio problems" on page 37
• "CD problems" on page 38
• "DVD problems" on page 39
• "Intermittent problems" on page 41
• "Keyboard, mouse, or pointing device problems" on page 41
• "Monitor problems" on page 43
• "Networking problems" on page 44
• "Option problems" on page 47
• "Performance and lockup problems" on page 48
• "Printer problems" on page 49
• "Serial port problems" on page 49
• "Software problems" on page 50
• "USB problems" on page 51

Audio problems

Select your symptom from the following list:
• "No audio in Windows" on page 37
• "An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive"
on page 38
• "Sound comes from one external speaker only" on page 38
• "No audio in DOS applications or games" on page 38
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.
.
Chapter 5 Troubleshooting and diagnostics
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