Acer AcerSystem (User Guide) - Manual (Page 27)

17
Eng
lis
h
press the volume control/mute knob on your USB keyboard to toggle from
mute to sound on.
• If headphones, earphones or external speakers are connected to the line-
out jack of your computer, the internal or built-in speakers are
automatically turned off.
System cannot read diskette, hard disk, CD or DVD information.
Check the following:
•
Make sure you are using the correct type of disk.
• Make sure the CD or DVD is inserted into the drive correctly.
• Check if the CD or DVD is clean and unscratched.
• Check your drive by using a good (undamaged) disk. If your drive can not
read the information on the good disk there may be a problem with the
drive. Contact your dealer or technical support center for assistance.
System cannot write data on the hard disk or CD-R/CD-RW.
Check the following:
•
Make sure the hard disk is not write-protected.
• Make sure you are using the correct type of disc.