Lenovo 10AS, Руководство пользователя

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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 that 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 that 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 94
• “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 106
• “Serial port problems” on page 106
• “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.
• 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.
• Some models have a front audio panel you can use to adjust volume. If you have a front audio panel,
verify that the volume is not set too low.
• Verify that your external speakers (and headphones, if used) are connected to the correct audio connector
on the computer. Most speaker cables are color-coded to match the connector.
Chapter 10
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Troubleshooting and diagnostics
93