5-6 Problem Solving
Additional Troubleshooting Procedures
This section provides a more detailed approach to diagnostic testing
and identification of a problem and locating its source.
Use the following troubleshooting procedures to help you identify a
problem. These general procedures lead you through the following:
Preparing the system for diagnostic testing
Monitoring POST while it is running
Verifying proper operation of key system LEDs
Confirming loading of the operating system.
Preparing the System for Diagnostic Testing
To prepare the system for diagnostic testing, perform the following:
Note:
Before disconnecting any peripheral cables
from the system, turn off the system and any
external peripheral devices. Failure to do so can
cause permanent damage to the system and/or the
peripheral devices.
1.
Turn off the system and all external peripheral devices. Disconnect
all devices from the system except the keyboard and video monitor.
2.
Make sure the system power cord is plugged into a properly
grounded AC outlet.
3.
Make sure your video display monitor and keyboard are correctly
connected to the system. Turn on the video monitor. Set its
brightness and contrast controls to at least two-thirds of their
maximum ranges (refer to the documentation supplied with your
video display monitor).
4.
If the operating system normally loads from the hard disk drive,
make sure there is no diskette in drive A. Otherwise, place a diskette
containing the operating system files in drive A.
5.
Turn on the system. If the power indicator LED does not light, refer
to “Power Light Does Not Light” found later in this chapter.
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