IBM 8651RM0 Hardware Maintenance Manual - Page 15

Diagnostics, Power-On Self-Test POST, POST Beep Codes

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Diagnostics The following tools are available to help you identify and resolve hardware-related problems: Power-on self-test (POST) POST beep codes Test programs Error messages Error Log (Event Log) Option Diskettes Power-On Self-Test (POST) Each time you power-on the system, it performs a series of tests that check the operation of the system and some options. This series of tests is called the power-on self-test, or POST. POST does the following: Checks some basic system-board operations Checks the memory operation Starts the video operation Detects and initializes ISA devices Detects and configures EISA devices Detects and configures PCI devices Verifies that the diskette drive, hard disk drive, and other installed devices are working Check the indicator lights on the front of the server and the back of the power supplies. Verify that all of the amber lights are off. If an amber lights are on, see "Status Indicators" on page 18 Verify that both green LEDs on the back of the power supplies are on. Verify that all server devices are operating properly. If a device is not operating properly, ensure that it is not defective and is installed correctly. Replace defective devices and reinstall any device that is not installed correctly. If POST finishes without detecting any problems, a single beep sounds and the first screen of the operating system or application program appears. If no operating system is installed, the system prompts you to insert bootable media. Refer to the information that came with the ServerGuide package for instructions on installing an operating system. If POST detects a problem, an error message appears on the screen. A single problem can cause several error messages to appear. When you correct the cause of the first error message, the other error messages probably will not appear on the screen the next time you power-on the system. POST Beep Codes POST generates one or more beeping sounds to indicate that the tests detect an error. One beep and the appearance of text on the monitor indicate successful completion of the POST. If the server IBM Netfinity 7000 - Type 8651 7

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Diagnostics
The following tools are available to help you identify and
resolve hardware-related problems:
Power-on self-test (POST)
POST beep codes
Test programs
Error messages
Error Log (Event Log)
Option Diskettes
Power-On Self-Test (POST)
Each time you power-on the system, it performs a series of
tests that check the operation of the system and some
options.
This series of tests is called the
power-on
self-test
, or
POST
.
POST does the following:
Checks some basic system-board operations
Checks the memory operation
Starts the video operation
Detects and initializes ISA devices
Detects and configures EISA devices
Detects and configures PCI devices
Verifies that the diskette drive, hard disk drive, and
other installed devices are working
Check the indicator lights on the front of the server and the
back of the power supplies.
Verify that all of the amber
lights are off.
If an amber lights are on, see “Status
Indicators” on page
18
Verify that both green LEDs on the
back of the power supplies are on.
Verify that all server
devices are operating properly.
If a device is not operating
properly, ensure that it is not defective and is installed
correctly.
Replace defective devices and reinstall any
device that is not installed correctly.
If POST finishes without detecting any problems, a single
beep sounds and the first screen of the operating system
or application program appears.
If no operating system is
installed, the system prompts you to insert bootable media.
Refer to the information that came with the ServerGuide
package for instructions on installing an operating system.
If POST detects a problem, an error message appears on
the screen.
A single problem can cause several error
messages to appear.
When you correct the cause of the
first error message, the other error messages probably will
not appear on the screen the next time you power-on the
system.
POST Beep Codes
POST generates one or more beeping sounds to indicate
that the tests detect an error.
One beep and the appearance of text on the monitor
indicate successful completion of the POST.
If the server
IBM Netfinity 7000 - Type 8651
7