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If you are using a cathode ray tube (CRT) monitor, set the monitor for the highest
noninterlaced refresh rate that it supports. If the monitor complies with the Video
Electronics Standards Association (VESA) display data channel (DDC) standard, it
is probably already set to the highest refresh rate the monitor and video controller
support. If you are not sure whether the monitor is DDC-compliant, see the
documentation that comes with the monitor.
If you are using a flat-panel monitor, the refresh rate does not have to be set to the
highest noninterlaced refresh rate that the monitor supports. Flat-panel monitors
produce flicker-free images even when they are operating at a minimum 60 Hz
noninterlaced rate.
If you have a dual-monitor video adapter, see the video adapter device-driver
readme file and documentation for more information about enabling dual monitors.
Using audio features
The computer has an integrated audio controller that supports Sound Blaster
applications. It also has a single internal speaker and three types of audio
connectors. The audio controller, enables you to record and play back sound and
music to enhance multimedia applications. Optionally, you can connect external
speakers to the line-out connector to provide improved sound with multimedia
applications.
The audio connectors in the computer are 3.5 mm (0.125 in.) mini-jacks. For the
location of the audio connectors, see "Input/output connectors" on page 57.
Line in
Line out
Microphone
Using security features
To deter unauthorized use of the computer, you can use anti-intrusion features and
other security features that are provided with the computer.
Anti-intrusion features
IBM anti-intrusion features help protect against the theft of computer components,
such as the microprocessor, memory modules, or hard disk drives.
You can set the chassis-intrusion detector switch inside the computer to alert the
network administrator each time the computer cover is removed. For more
information about setting the chassis-intrusion alert, see Chapter 3, "Configuring the
computer," on page 21.
16
IBM IntelliStation M Pro Type 9229: User's Guide
This connector accepts audio signals into the computer from external
devices, such as the line output from a stereo, television, or a musical
instrument. One line-in connector is on the rear of the computer.
This connector sends audio signals from the computer to external devices,
such as speakers with built-in amplifiers, headphones, a multimedia
keyboard, or the audio line-in jack on a stereo system. Line-out connectors
are on both the front and the rear of the computer.
Use this connector to connect a microphone to the computer when you
want to record voice or other sounds on the hard disk. With a microphone
attached to the computer, you can also use speech-recognition software.
One microphone connector is on the front of the computer.
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