Troubleshooting, Audio problems – Lenovo H520e Desktop User Manual
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• If you are unable to run the diagnostic program, contact the Lenovo Customer Support Center. See
“Lenovo Support Web site” on page 30 for more information.
• If the diagnostic program does not detect a hardware failure, continue with the next step.
7. Use an antivirus program to see if your computer has been infected by a virus. If the program detects a
virus, remove the virus.
8. If none of these actions solve the problem, seek technical assistance. See “Lenovo Support Web
site” on page 30 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:
•
•
•
•
“Intermittent problems” on page 39
•
“Hard disk drive problems” on page 39
•
“Keyboard, mouse, or pointing device problems” on page 40
•
•
“Networking problems” on page 43
•
•
“Performance and lockup problems” on page 47
•
•
“Serial port problems” on page 49
•
“Software problems” on page 50
•
Audio problems
Select your symptom from the following list:
•
“No audio in Windows” on page 36
•
•
“Sound comes from one external speaker only” on page 36
•
“No audio in DOS applications or games” on page 36
.
Troubleshooting and diagnostics
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