IBM 62174DU - IntelliStation A - Pro 6217, Installation Manual, Page: 70 / 98

Power-on self-test (POST)
When you turn on the computer, it performs a series of tests to check the operation
of system components and some of the options in the computer. This series of tests
is called the power-on self-test, or POST.
If a power-on password is set, you must type the password and press Enter, when
prompted, for POST to run.
If the POST process completes without detecting any problem, a single beep
sounds, and the computer startup is completed.
If the POST process detects a problem, more than one beep might sound, or an
error message is displayed. See “Beep code descriptions” in the User’s Guide and
“POST error codes” for more information.
POST beep codes
A beep code is a combination of short and long beeps or a series of short beeps
separated by pauses (intervals without sound). For example, a “1-2-3” beep code is
one short beep, a pause, two short beeps, a pause, and three short beeps. A beep
code other than one beep indicates that POST has detected a problem. To
determine the meaning of a beep code, see “Beep code descriptions” in the
Problem Determination and Service Guide on the IBM IntelliStation Documentation
CD. If no beep code sounds, see “No-beep symptoms” in the User’s Guide on the
IBM IntelliStation Documentation CD.
POST error codes
The following table provides an abbreviated list of the POST error codes that might
appear during startup.
Note: See the Problem Determination and Service Guide on the IBM IntelliStation
Documentation CD for more information about the POST error messages.
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IntelliStation A Pro Type 6217: Installation Guide