IBM 866011U - Netfinity 5500 - 8660, Hardware Maintenance Manual

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Power-on self-test (POST)
When you turn on the server, it performs a series of tests
to check the operation of server components and some of
the options installed in the server. This series of tests is
called the power-on self-test or POST.
POST does the following:
Ÿ
Checks the operation of some basic system board
operations
Ÿ
Checks the memory
Ÿ
Compares the current server configuration with the
stored server configuration information
Ÿ
Configures PCI adapters
Ÿ
Starts the video operation
Ÿ
Verifies that drives (such as the diskette, CD-ROM,
and hard disk drives) are connected properly
If you have a power-on password or administrator
password set, you must type the password and press
Enter, when prompted, before POST will continue.
While the memory is being tested, the amount of available
memory appears on the screen. These numbers advance
as the server progresses through POST and the final
number that appears on the screen represents the total
amount of memory available. If POST finishes without
detecting any problems, a single beep sounds, the first
screen of the operating system or application program
appears, and the System POST Complete (OK) light is
illuminated on the information LED panel.
If POST detects a problem, more than one beep sounds
and an error message appears on the screen.
Note: A single problem might cause several error
messages. When this occurs, work to correct the cause of
the first error message. After the cause of the first error
message is corrected, the other error messages usually
will not occur the next time you run the test.
For a complete list of error codes, see “Symptom-to-FRU
index” on page 264.
POST beep codes
POST generates beep codes to indicate successful
completion or the detection of a problem.
Ÿ
One beep indicates the successful completion of
POST.
Ÿ
For a complete list of error codes, see
“Symptom-to-FRU index” on page 264.
Netfinity 5500 - Type 8660
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