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v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v See Chapter 4, "Parts listing," on page 41 to determine which components are CRUs and which components
are FRUs.
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Lit light path
diagnostics LED
Description
None
An error has occurred and cannot be isolated.
GPU
A GPU adapter error has occurred.
CFFh
A CFFh adapter error has occurred.
BPE4
An error has occurred in the expansion unit.
Ck Nxt
An error has occurred in an expansion unit
installed below this expansion unit in the
stack.
Dynamic system analysis diagnostic programs and messages
Use this information to learn more about using the dynamic system analysis (DSA)
diagnostic programs and messages to resolve blade server errors.
The Dynamic System Analysis (DSA) Preboot diagnostic programs are the primary
method of testing the major components of the server. DSA is a system information
collection and analysis tool that you can use to provide information IBM service
and support to aid in the diagnosis of the system problems.
Action
1. Make sure that the LP LED is lit to ensure
that there is enough power in the
expansion unit to light the rest of the
LEDs.
2. Check the event logs on the blade server
and Advanced Management Module for
information about an error that is not
represented by a light path diagnostics
LED.
1. Make sure that the GPU adapter installed
in the PCIe connector is supported.
2. Check the auxiliary power cable.
3. Replace the GPU adapter installed in the
PCIe connector.
4. (Trained service technician only) Replace
the expansion unit.
1. Make sure that the adapter installed in the
CFFh connector is supported.
2. Reseat the adapter installed in the CFFh
connector.
3. Replace the adapter installed in the CFFh
connector.
4. (Trained service technician only) Replace
the expansion unit.
1. Check for other specific error LEDs that are
lit in the expansion unit.
2. (Trained service technician only) If no
other error LEDs are lit, replace the
expansion unit.
(Trained service technician only) Remove this
expansion unit and check for error LEDs that
are lit in the expansion unit beneath it.
Chapter 6. Diagnostics
189
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