Note: The internal speaker in your computer is disabled when
an external speaker is connected to the headphone port
on your computer.
Audio Line In: This jack is used to accept audio signals from external
devices, such as line output from a stereo or television system,
or a musical instrument, into the computer sound system.
Microphone: This port is used to connect a microphone to your computer
when you want to record voice or other sounds on the hard
disk. This port can also be used by speech recognition
software.
Note: If you experience interference or speaker feedback while
recording, try reducing the microphone recording
volume (gain).
Procedures for recording and playing back sound vary by operating system.
Refer to your operating system documentation for information and
instructions.
Updating system programs
System programs are the basic layer of software built into your computer.
They include the power-on self-test (POST), the basic input/output system
(BIOS) code, and the Configuration/Setup Utility program. POST is a set of
tests and procedures that is performed each time you turn on your
computer. BIOS is a layer of software that translates instructions from other
layers of software into electrical signals that the computer hardware can
understand. You can use the Configuration/Setup Utility program to view
and change the configuration and setup of your computer.
Your computer system board has a firmware hub module called electrically
erasable programmable read-only memory (EEPROM, also referred to as flash
memory). You can easily update POST, BIOS, and the Configuration/Setup
Utility program by starting your computer using a flash update diskette or
by using the Remote Administration feature, if it is enabled. See “Setting
remote administration” on page 39 for more information.
As part of the continuing work to improve quality, IBM might make
changes and enhancements to the system programs. When updates are
released, they are available as downloadable files on the World Wide Web
or through the PC Company Bulletin Board Service (see Chapter 8, “Getting
help, service, and information” on page 115). Instructions for using the
system programs updates are available in a README file included in the
update files.
Chapter 3. Operating your computer 27
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