IBM BladeCenter HS22V 7871 Problem Determination And Service Manual page 213

v See Chapter 4, "Parts listing, Types 7871 and 1949," 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.
Error code Description
166-903-xxx Failed the IMM I2C test due to a failure in the
DIMM bus.
Action
1. Turn off the blade server, open the blade server
release levers and pull the blade server away
from the blade module bay, but do not remove
it. See "Removing the blade server from the
BladeCenter unit" on page 52 for more
information.
2. Wait 45 seconds and reseat the blade server in
the blade module bay and turn on the blade
server. See "Installing the blade server in a
BladeCenter unit" on page 53 and "Turning on
the blade server" on page 13.
3. Rerun the test. See "Diagnostic tools overview"
on page 97.
4. Make sure that the DSA Diagnostic code is
up-to-date, upgrade if necessary; then, rerun
the test. The latest code can be found on the
IBM support Web site at http://
www.ibm.com/support/
docview.wss?uid=psg1SERV-DSA.
5. Make sure that the component firmware level
is up-to-date, upgrade if necessary; then, rerun
the test. The installed firmware level can be
found in the DSA Diagnostic Event Log within
the Firmware/VPD section for this component.
The latest level firmware for this component
can be found on the IBM support Web site at
http://www.ibm.com/support/
docview.wss?uid=psg1MIGR-4JTS2T.
6. Reseat the DIMMs (see "Removing a memory
module" on page 63 and "Installing a memory
module" on page 64).
7. Rerun the test.
8. If the error occurs, replace one DIMM at a time
until the error is resolved (see "Removing a
memory module" on page 63 and "Installing a
memory module" on page 64).
9. Rerun the test.
10. (Trained service technician) If the failure
remains, replace the system-board (see
"Removing the system-board assembly" on
page 94 and "Installing the system-board
assembly" on page 95).
197
Chapter 6. Diagnostics