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POST beep code descriptions
Table 2. POST beep code descriptions
Beep code
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 persists, 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.
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
If the video controller on the system board is being used, call for service. If you installed an optional
one short
video adapter, replace the failing adapter
One long and
A video I/O adapter ROM is not readable, or the video subsystem is defective. If you installed an
two short
optional video adapter, replace the failing adapter. If the problem remains, call for service.
One long and
The system-board video subsystem has not detected a monitor connection to the server. Ensure that
three short
the monitor is connected to the server. If the problem persists, replace the monitor.
Two long and
POST does not support the optional video adapter. Replace the optional video adapter with one that
two short
is supported by the server or use the integrated video controller.
All other beep
1. Verify that the system memory modules are installed correctly.
codes
2. Tun off the server; then, restart the server. If the problem remains, call for service.
POST error messages
30
IBM® xSeries 150: Installation Guide
•
Diagnostic programs and error messages
The server diagnostic programs are stored in upgradable read-only memory
(ROM) on the system board. These programs are the primary method of testing
the major components of your server.
Refer to the "Solving Problems" section in the User's Reference on the IBM
Note:
xSeries Documentation CD for more detailed information about the
diagnostic programs.
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:
Refer to the "Solving Problems" section in the User's Reference on the IBM
xSeries Documentation CD for more detailed information about the POST beep
codes.
Descriptions of the POST beep codes
The following table provides an abbreviated list of the error messages that might
appear during POST.
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