Troubleshooting; Audio Problems - Lenovo 7052A7U User Manual

8. If none of these actions solve the problem, seek technical assistance. See Chapter 11 "Getting
information, help, and service" on page 109 for more information.

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 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 91
• "CD problems" on page 93
• "DVD problems" on page 93
• "Intermittent problems" on page 95
• "Keyboard, mouse, or pointing device problems" on page 95
• "Monitor problems" on page 97
• "Networking problems" on page 99
• "Option problems" on page 101
• "Performance and lockup problems" on page 102
• "Printer problems" on page 105
• "Serial port problems" on page 105
• "Software problems" on page 105
• "USB problems" on page 106

Audio problems

Select your symptom from the following list:
• "No audio in Windows" on page 91
• "An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive"
on page 92
• "Sound comes from one external speaker only" on page 92
• "No audio in DOS applications or games" on page 92
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.
.
Chapter 10 Troubleshooting and diagnostics
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