IBM 865263Y Handbook - Page 39

Solving problems, General symptoms, Power-on self-test (POST), POST beep codes

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Chapter 5. Solving problems This chapter provides information on IBM Netfinity 4000R error conditions, POST beep codes, error codes, error messages, and any diagnostic tools that might be available. General symptoms If... Your server does not start when you press the power switch Your server starts but does not respond to communication requests Your server beeps during POST, before the display is initialized Then... Follow the instructions in Appendix A, "Help and service information" on page 73 to place a service call to IBM. Record the number of beeps. Then, follow the instructions in Appendix A, "Help and service information" on page 73 to place a service call to IBM. Power-on self-test (POST) Each time you turn on your server, it performs a series of tests that check the operation of the base computer. This series of tests is called the power-on self-test (POST). POST does the following: Checks basic system-board operations Checks the memory operation Compares the current system configuration with that established by the Configuration/Setup Utility program Starts the video operation Verifies that the hard disk drive and the CD-ROM drive are working POST beep codes If POST detects a problem, you will hear one or more beeps. Any beep before the video initializes indicates an error. In most cases, an error code appears in the top left corner of the screen, and in some cases a description of the error is displayed beside the code. (Note that the screen will sometimes display multiple error codes and descriptions.) © Copyright IBM Corp. 1999 29

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Chapter 5. Solving problems
This chapter provides information on IBM Netfinity 4000R error conditions, POST
beep codes, error codes, error messages, and any diagnostic tools that might be
available.
General symptoms
If...
Then...
±
Your server does not start when
you press the power switch
±
Your server starts but does not
respond to communication
requests
Follow the instructions in Appendix
A,
“Help and service information” on
page
73 to place a service call to
IBM.
Your server beeps during POST,
before the display is initialized
Record the number of beeps.
Then,
follow the instructions in Appendix
A,
“Help and service information” on
page
73 to place a service call to
IBM.
Power-on self-test (POST)
Each time you turn on your server, it performs a series of tests that check the
operation of the base computer.
This series of tests is called the
power-on self-test
(POST)
.
POST does the following:
±
Checks basic system-board operations
±
Checks the memory operation
±
Compares the current system configuration with that established by the
Configuration/Setup Utility program
±
Starts the video operation
±
Verifies that the hard disk drive and the CD-ROM drive are working
POST beep codes
If POST detects a problem, you will hear one or more beeps.
Any beep before the
video initializes indicates an error.
In most cases, an error code appears in the top left corner of the screen, and in
some cases a description of the error is displayed beside the code.
(Note that the
screen will sometimes display multiple error codes and descriptions.)
Copyright IBM Corp. 1999
29