BenQ Joybook S33 Series User Manual page 67

• The volume may have been set too low. Use the <Fn> + <F9>
hotkey combination to increase the volume.
• An earphone or external speakers may have been connected to
the audio output socket, turning off the Joybook's built-in
speakers automatically.
When a CD or DVD is inserted into the optical drive, there is no
response.
Verify the following:
• Your Joybook is turned on, and the CD or DVD discs are
properly inserted in the center of the disc tray in the optical
drive.
• The disc tray is closed.
• The CD or DVD is not bent or badly scratched.
• If you hear the noise from the optical drive when the disc plays,
the optical drive might be deformed, and the Joybook needs to
be repaired. If the disc tray does not open after the eject button
is pressed, insert a pointed object (like an opened paper clip)
into the tray ejection hole next to the ejection button to release
the disc tray.
Why is the hard disk capacity displayed by the OS different from
its nominated capacity?
You may have discovered that the capacity of a 10GB hard disk
becomes 9GB when displayed from the OS, and 20GB becomes
19GB, etc. The bigger the capacity, the bigger the difference. It is
because hard disk manufacturers and OS developers calculate
hard disk capacity in different ways. As a result, the nominated
capacity is different from the exact capacity displayed by the OS.
Calculation of hard disk
capacity by hard disk
manufacturers
1GB=1,000MB
1MB=1,000KB
1KB=1,000 bytes
Example of a 40GB hard disk:
Calculation by hard disk
manufacturers
40GB=40,000MB
=40,000,000KB
=40,000,000,000 bytes
Exact capacity of a 40GB hard disk displayed in the OS:
40,000,000,000÷1024÷1024÷1024=37.2529 (GB).
Furthermore, when a hard disk is partitioned, the system will
reserve some space on the drive for system files. Therefore, the
total capacity of a hard disk displayed by the OS will never be the
same as its nominated capacity.
Calculation of hard disk
capacity by OS
developers
1GB=1,024MB
1MB=1,024KB
1KB=1,024 bytes
Calculation by OS
developers
40GB=40,960MB
=41,943,040KB
=42,949,672,960 bytes
FAQ and troubleshooting 63