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2-4
Troubleshooting
2.3 Power-On Self-Test (POST)
The Power-On Self-Test (POST) is a series of tests that run every time the computer is
turned on. POST verifies that the system is configured and functioning properly.
To run POST, complete the following steps:
1. Complete the preliminary steps (Section 2.1).
2. Turn on the computer.
If POST does not detect any errors, the computer beeps once or twice to indicate that
POST has run successfully. The computer boots from the hard drive or from a bootable
diskette if one is installed in the diskette drive.
2.4 POST Error Messages
If the system is not functioning well enough to run POST, or if the display is not
functioning well enough to show POST error messages, refer to the Troubleshooting
tables in Section 2.7.
If POST detects an error, one of the following events occurs:
■
A message with the prefix "WARNING" appears, informing you where the error
occurred. The system pauses until you press
F1
to continue.
■
A message with the prefix "FATAL" appears, informing you where the error
occurred. After the message, the system emits a series of beeps, then stops.
■
The system emits a series of beeps, then stops.
Warning messages indicate that a potential problem, such as a system configuration
error, exists. When
F1
is pressed, the system should resume. You should be able to
correct problems that produce WARNING messages.
IMPORTANT:
When a WARNING message includes the prompt to "RUN SCU," press
F10
to run Computer Setup. (Computer Setup replaces the SCU utility.)
