Troubleshooting; Audio Problems; No Audio In Windows - Lenovo 7052C9U User Manual

8. If none of these actions solve the problem, seek technical assistance. See Chapter 11 "Getting
information, help, and service" on page 111 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 93
• "CD problems" on page 95
• "DVD problems" on page 95
• "Intermittent problems" on page 97
• "Keyboard, mouse, or pointing device problems" on page 97
• "Monitor problems" on page 99
• "Networking problems" on page 101
• "Option problems" on page 103
• "Performance and lockup problems" on page 104
• "Printer problems" on page 107
• "Serial port problems" on page 107
• "Software problems" on page 107
• "USB problems" on page 108

Audio problems

Select your symptom from the following list:
• "No audio in Windows" on page 93
• "An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive"
on page 94
• "Sound comes from one external speaker only" on page 94
• "No audio in DOS applications or games" on page 94

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
93