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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 consumable, structural, or CRU
parts.
v If an action step is preceded by "(trained technician only)," that step must be performed only by a trained
technician.
Lit light path
diagnostics LED
Description
Ck Nxt
An error has occurred in an expansion unit
installed below this expansion unit in the
stack.
IBM Dynamic System Analysis Preboot diagnostic program
IBM Dynamic System Analysis (DSA) Preboot diagnostic program collects and
analyzes system information to aid in diagnosing blade server problems.
DSA Preboot might appear to be unresponsive when you start the program. This is
normal operation while the program loads.
To diagnose and resolve DSA messages, see "Diagnostic messages" on page 193.
Running the diagnostic programs
Use this information to run DSA Preboot.
Important: The DSA diagnostic programs do not support USB CD-ROM drives. If
you run the DSA diagnostic programs while any USB CD-ROM drives are
attached, ignore any optical drive test results that are returned for USB CD-ROM
drives. You can also remove USB CD-ROM drives before you run the DSA
diagnostic programs to get accurate optical drive test results.
To run the DSA Preboot diagnostic programs, complete the following steps:
1. If the blade server is running, turn off the blade server and all attached devices.
2. Turn on all attached devices; then, turn on the blade server.
3. When the prompt <F2 Diagnostics> is displayed, press F2.
4. Select Quit to DSA to exit from the stand-alone memory diagnostic program.
5. Enter gui to launch the DSA graphical user interface, or type cmd to display
6. From the diagnostic programs screen, select the test that you want to run and
Note: DSA Preboot might appear to be nonresponsive for an unusual length of
time when you start the program. This is normal operation while the program
loads.
Note: After you exit from the stand-alone memory diagnostic environment,
you must restart the blade server to access the stand-alone memory diagnostic
environment again.
the DSA interactive menu.
follow the instructions on the screen. For additional information, see the
Dynamic System Analysis Installation and User's Guide, which is available at
http://www.ibm.com/support/entry/portal/docdisplay?lndocid=SERV-DSA .
Action
(Trained technician only) Remove this
expansion unit and check for error LEDs that
are lit in the expansion unit beneath it.
Chapter 6. Diagnostics
191
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