IBM 6219 - IntelliStation M - Pro, Hardware Maintenance Manual

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Power-on self-test (POST)
When you turn on the computer, the power-on self-test (POST) performs a series of
tests to check the operation of system components and some of the installed
options.
If POST finishes without detecting any problems, the first window of your operating
system or application program appears.
If POST detects a problem, more than one beep sounds and an error message
appears on your screen.
Notes:
1. If you have a user password set, you must type the password and press Enter,
when prompted, before the operating system will start.
2. A single problem might cause several error messages. When this occurs, work
to correct the cause of the first error message. After you correct the cause of
the first error message, the other error messages usually will be resolved the
next time you run the test.
POST beep codes
The possible types of beep codes are:
No beeps
If no beep occurs after your computer completes POST, see “Undetermined
problems” on page 98.
Continuous beep
Your startup (boot) microprocessor has failed, or your system board or
speaker subsystem might contain a failing component. If the system
continues through POST with no errors, see “General checkout” on page 1.
If no video appears, the startup processor has failed.
Beep codes for specific failures
Beep codes indicating specific system problems. For complete list of beep
codes see “POST error codes” on page 90.
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IBM IntelliStation M Pro Type 6219: Hardware Maintenance Manual