Chapter 4: diagnostics, Power-on self test (post), 4 diagnostics – HP TC2120 User Manual
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When the server boots, a series of tests are displayed on the screen. The number of tests displayed depends on
the configuration of the server. The following are the types of errors you might get with the hp server.
• Built-in diagnostic error messages.
• BIOS and other error messages. These are errors detected by the system BIOS outside the built-in diag-
nostics or application errors.
To see the Power On Self-Tests (POST):
• The hp server must be functionally able to run the diagnostics.
• The video system must be functional.
• The keyboard must be functional.
Power-On Self Test (POST)
The diagnostics (Power-On Self-Tests, or POST) run automatically each time the server is powered on. These
diagnostics, which reside in the BIOS ROM, isolate server-related logic failures and indicate the board or
component that needs to be replaced, as indicated by the error messages. Most server hardware failures will be
accurately isolated by the diagnostics.
There are two types of error messages:
• Power-on self-test (POST) messages – These text messages display in normal video (white text on black
background). If a text message error occurs during the POST, details of the error are displayed. Follow the
instructions on the screen or refer to
in this section for instructions.
• Beep Codes – These are a series of audible beeps, which occur during the boot process before the video
display can initialize allowing the visual messages of the POST routines to appear. If you hear a series of
audible beeps before the video appears on screen, refer to the beep codes listed in
Ιf no message appears (screen is blank), listen for the beep codes and refer to
for
more information. If no message appears but the server stops after POST, see
. If an error message appears during POST, refer to
this chapter and follow the instructions provided. If the problem persists, refer to
or call your HP Customer Support provider for assistance.
4 Diagnostics
NOTE
The BIOS ROM version number is displayed on the monitor
screen during power-up.
WARNING
Always turn off the power and disconnect the power cord to
the server before attempting to remove the cover and touch
the internal components. Failing to do so can expose you to
electric shock and damage the server’s components. The
power switch does NOT turn off standby power; you must
disconnect the power cord to turn off standby
power.