Lenovo M73 manual Audio problems, No audio in Windows

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 program 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 103

•“CD problems” on page 104

•“DVD problems” on page 105

•“Intermittent problems” on page 107

•“Keyboard, mouse, or pointing device problems” on page 107

•“Monitor problems” on page 109

•“Networking problems” on page 110

•“Option problems” on page 113

•“Performance and lockup problems” on page 114

•“Printer problems” on page 116

•“Serial port problems” on page 116

•“Software problems” on page 117

•“USB problems” on page 118

Audio problems

Select your symptom from the following list:

•“No audio in Windows” on page 103

•“An audio disc or AutoPlay-enabled disc does not automatically play when it is inserted into a drive” on page 104

•“Sound comes from one external speaker only” on page 104

•“No audio in DOS applications or games” on page 104

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. Troubleshooting and diagnostics 103