User Manual

Troubleshooting and Maintenance
Troubleshooting Techniques
Reference GuideStartup Guide 99
• When you are operating your computer in MS-DOS mode (for example, when
running MS-DOS games), you may find that the sound does not operate properly. Use
Windows applications for full use of sound capabilities.
If sound does not record
• Check the software controls for recording sound: click Start, Programs, Accessories,
Multimedia (or Entertainment), Sound Recorder.
• In Volume Control, click Options, Properties, and make sure the microphone is
enabled in the recording controls.
• Test the audio with the e-DiagTools diagnostics. See “Testing the Hardware” on
page 120.
If you hear a loud high-pitched whine (feedback) from the speakers
• In the Volume Control, try reducing the Master volume: double-click the speaker icon
in the taskbar.
• In Volume Control, click Options, Properties, and select the microphone option for
the playback settings. Then in Volume Control, make sure the microphone is muted.
• Avoid using the built-in microphone and built-in speaker at the same time.
CD-ROM and DVD Problems
If you can’t boot from a CD or DVD in the CD/DVD drive
• Make sure the CD or DVD is bootable, such as the Recovery CD.
• Make sure the CD-ROM/DVD drive is selected as the boot device—see “To change
the boot device” on page 34.
• Restart the computer: click Start, Shut Down, Restart.
• Test the DVD drive with the e-DiagTools diagnostics. See “Testing the Hardware” on
page 120.
If a DVD plays erratically
• Dirt or smudges can cause a disc to skip. Clean the disc with a soft cloth. If the disc is
badly scratched, it will probably have to be replaced.