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The computer emits a loud, high-pitched noise.
This is feedback between the microphone and the speakers. It
occurs in any sound system when input from a microphone is fed
to the speakers and the speaker volume is too loud. Adjust the
volume control.
If you have changed the settings for the Record Monitor feature in
the Recording Control Utility (default Off) or the Mute feature in
the Mixer Utility (default Enabled), these may cause feedback.
Revert to the default settings.
Optional devices
Optional devices can include a printer, PC Cards, an external
monitor, or any other device you connect to your computer to
expand its capabilities.
For an external monitor, see "Display problems" on page 122.
PC Card problems
Most PC Card problems occur during installation and setup of
new cards. If you're having trouble getting one or more of these
devices to work together, several sections in this chapter may
apply.
Resource conflicts can cause problems when using PC Cards.
Refer to "Resolving a hardware conflict" on page 114.
Card information structure (CIS)
When you insert a PC Card into a slot, the computer attempts to
determine the type of card and the resources it requires by reading
its CIS. Sometimes the CIS contains enough information for you
to use the card immediately. Other cards must be configured
before you can use them.
Troubleshooting Guide
Fixing device-related problems
Part I: Getting to Know Your Computer
129
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