Service manual

Chapter 3 Server Diagnostics 3-5
5.
Run POST. POST performs basic tests of the server components
and reports faulty FRUs.
Note - diag_level=min is the default ALOM
CMT setting, which tests devices required to boot
the server. Use diag_level=max for
troubleshooting and hardware replacement.
• If POST indicates a faulty FRU while
diag_level=min, replace the FRU.
• If POST indicates a faulty memory device while
diag_level=max, the detected errors might be
correctable by PSH after the server boots.
• If POST does not indicate a faulty FRU, go to
Action No.
9.
Section 3.4, “Running
POST” on page 3-22
TABLE 3-5, TABLE 3-6
Chapter 5
Section 3.4.5, “Correctable
Errors Detected by POST”
on page 3-35
6.
Determine if the
fault is an
environmental
fault.
If the fault listed by the showfaults command
displays a temperature or voltage fault, then the
fault is an environmental fault. Environmental
faults can be caused by faulty FRUs (power supply
or fan tray) or by environmental conditions such as
when computer room ambient temperature is too
high, or the server airflow is blocked. When the
environmental condition is corrected, the fault will
automatically clear. You can also use the fault LEDs
on the server to identify the faulty FRU (fan tray or
power supply).
Section 3.3.2, “Running
the showfaults
Command” on page 3-16
Chapter 5, Section ,
“Replacing Field-
Replaceable Units” on
page 5-1
Section 3.2, “Using LEDs
to Identify the State of
Devices” on page 3-8
TABLE 3-1 Diagnostic Flow Chart Actions (Continued)
Action
No. Diagnostic Action Resulting Action
For more information, see
these sections