IBM 7985 Problem Determination And Service Manual page 81

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, System x3655, Type 7985 and 7943," on page 93 to determine which
components are customer replaceable units (CRU) and which components are field replaceable units
(FRU).
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
166-404-001 System Management: Failed
BMC indicates failure in I
166-406-001 System Management: Failed
BMC indicates failure in I
166-407-001 System Management: Failed
BMC indicates failure in I
166-nnn-001 System Management: Failed
Note: nnn indicates the failure type.
v 300 to 320: Self-test failure
v 400 to 420 (excluding 412, 414, and 415):
2
I C bus test failure
Action
1. Disconnect all power cords and external cables
2
C bus test.
from the server, wait 30 seconds, reconnect the
power cords and cables, and retry the test.
2. Update the BMC firmware to the latest level.
3. Reseat the power backplane.
4. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. Power backplane
b. (Trained service technician only) System
1. Disconnect all power cords and external cables
2
C bus test.
from the server, wait 30 seconds, reconnect the
power cords and cables, and retry the test.
2. Update the BMC firmware to the latest level.
3. Reseat the following components:
a. Hard disk drive signal cable
b. Hard disk drive backplane
4. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. Hard disk drive backplane
b. (Trained service technician only) System
1. Disconnect all power cords and external cables
2
C bus test.
from the server, wait 30 seconds, reconnect the
power cords and cables, and retry the test.
2. Update the BMC firmware to the latest level.
3. Reseat the operator information panel cable.
4. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. Operator information panel assembly
b. (Trained service technician only) System
1. Disconnect all power cords and external cables
from the server, wait 30 seconds, reconnect the
power cords and cables, and retry the test.
2. Update the BMC firmware to the latest level.
3. (Trained service technician only) Replace the
system board.
board.
board
board
Chapter 3. Diagnostics
63