Chapter 5. Solving problems
This section provides basic troubleshooting information to help you resolve some
common problems that might occur while setting up your server.
If you cannot locate and correct the problem using the information in this section,
see the
Hardware Maintenance Manual and Troubleshooting Guide
on the
IBM
xSeries Documentation
CD and the “Server Support” flowchart in the front of this
booklet.
POST beep code descriptions
POST emits one beep to signal successful completion. If POST detects a problem
during startup, other beep codes might occur. You can use the following beep code
descriptions to help identify and resolve problems that are detected during startup.
Note: See the “Solving problems” section of the
Hardware Maintenance Manual
and Troubleshooting Guide
on the
IBM xSeries Documentation
CD for more
information about the POST beep codes.
Table 4. POST beep code descriptions
Beep code
Descriptions of the POST beep codes
No beep
Call for service.
Continuous
If no video appears, the startup microprocessor failed. Verify that the startup microprocessor is
installed correctly. If it is, replace the startup microprocessor. If the problem remains, call for
service.
One short
POST completed successfully. One beep also occurs after POST if you enter an incorrect
password.
Two short
Follow the instructions that appear on the screen.
Three short
POST detected a system memory error. Verify that the memory is installed correctly. If it is,
replace the failing memory module.
Important: In some memory configurations, the 3-3-3 beep code might sound during POST
followed by a blank monitor screen. If this occurs and the Boot Fail Count feature in the Start
Options menu of the Configuration/Setup Utility program is set to Enabled (its default setting),
you must restart the server three times to force the system BIOS to reset the memory connector
or pair or quad of connectors from Disabled to Enabled.
Repeating short
The system board might contain a failing component.
1. Verify that the keyboard and pointing devices are connected properly.
2. Ensure that nothing is resting on the keyboard.
3. Disconnect the pointing device; then, restart the server. If the problem goes away, replace the
pointing device. If the problem remains, call for service.
One long and
one short
If the video controller on the system board is being used, call for service. If you installed an
optional video adapter, replace the failing adapter
One long and
two short
A video I/O adapter ROM is not readable, or the video subsystem is defective. If you installed an
optional video adapter, replace the failing adapter. If the problem remains, call for service.
One long and
three short
The system-board video subsystem has not detected a monitor connection to the server. Ensure
that the monitor is connected to the server. If the problem remains, replace the monitor.
Two long and
two short
POST does not support the optional video adapter. Replace the optional video adapter with one
that is supported by the server or use the integrated video controller.
All other beep
codes
1. Verify that the system memory modules are installed correctly.
2. Turn off the server; then, restart the server. If the problem remains, call for service.
© Copyright IBM Corp. 2003
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