Troubleshooting and Maintenance 
  Troubleshooting Your Computer 
  Reference Guide 101 
If sound does not record 
•  Check the software controls for recording sound: click Start, Programs (or All 
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 123. 
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 30. 
•  Restart the computer: click Start, Shut Down (or Turn Off Computer), Restart. 
•  Test the DVD drive with the e-Diagtools diagnostics. See “Testing the Hardware” on 
page 123. 
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. 
If a DVD movie stops playing in the middle 
•  The DVD may be double-sided. Open the DVD tray, and read the text near the center 
hole of the disc. If it says Side A, flip the disc over, close the tray, and press the Play 
button to continue playing the movie. 
•  You may have accidentally paused the DVD movie. Press the Play button to resume.