FAQ and troubleshooting
57
• 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 jack, turning off the Joybook Lite's built-in
speakers automatically.
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.
Example of a 40GB hard disk:
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.
I hear noise when connecting an earphone to the Joybook Lite.
Verify the following:
• Connect the earphone to other devices, such as a radio to see if
you can still hear that noise. If the noise persists, the earphone
may be out of order.
• If you can hear the noise only when inserting, it is the result of
high instantaneous current. It is a normal phenomenon.
Calculation of hard disk
capacity by hard disk
manufacturers
Calculation of hard disk
capacity by OS
developers
1GB=1,000MB
1MB=1,000KB
1KB=1,000 bytes
1GB=1,024MB
1MB=1,024KB
1KB=1,024 bytes
Calculation by hard disk
manufacturers
Calculation by OS
developers
40GB=40,000MB
=40,000,000KB
=40,000,000,000
bytes
40GB=40,960MB
=41,943,040KB
=42,949,672,960
bytes
JBL_U122_Eco_UM_EN.book Page 57 Monday, October 12, 2009 2:39 PM
