Diagnostics; Power-On Self Test (Post); No Error Messages Displayed - HP TC4100 Operation And Maintenance Manual

5 Diagnostics

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 kinds of errors a user 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
diagnostics or application errors.
To see the Power On Self-Tests (POST):
•
The HP Server must be functionally able to run the diagnostics.
•
The video subsystem must be functional.
•
The keyboard must be functional.
NOTE

Power-On Self Test (POST)

The diagnostics Power-On Self Tests (POSTs) 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 diagnostic.
WARNING
There are two kinds of error messages that appear during the POST process and the causes of these messages
may prevent the server from completing the boot process. These are:
•
Messages in reverse video (black text on white background).
Press the Return key to see a definition of the message and what action to take to remedy the problem.
•
Power-on self test (POST) errors - These display in normal video (white text on black background) and may
be a text message or an alpha-numeric code. If an error with a text message occurs during the POST, details
of the error are displayed. Follow the instructions on the screen. If an alpha-numeric code appears, refer to
the section "Power On Self Test (POST) Error Codes" later in this chapter.

No Error Messages Displayed

General Checks:
1. All external cables and power cords are firmly plugged in.
2. The power outlet is working.
3. The server and monitor are turned on. (The power-on indicator should be illuminated.)
4. The display's contrast and brightness settings are correct.
5. All internal cables are properly connected and all boards firmly seated.
BIOS ROM version number is displayed on the monitor screen during power-up.
You should always turn off the power and disconnect the power cord(s) to the server
before opening the HP Server tc 4100 and attempting to remove the cover and touching
the internal components. Failing to do so can expose you to electric shock and the
server's components to damage. The power switch does NOT turn off standby power, so
disconnect the power cord(s) to turn off standby power.
78