IBM System x3950, Problem Determination And Service Manual

Page: 88 / 190

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 3, “Parts listing, Type 8878 and 8879,” on page 109 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 Action
166-201-005 ISMP indicates I2C errors on bus S.
1. Reseat the following components:
a. SAS hard disk drive backplane cables
b. I/O board
2. Replace the following components one at a time,
in the order shown, restarting the server each
time.
a. SAS hard disk drive backplane
b. I/O board
166-201-006 ISMP indicates I2C errors on bus O.
1. Reseat the following components:
a. (Trained service technician only) Operator
information panel
b. I/O board
2. Replace the components listed in step 1 one at a
time, in the order shown, restarting the server
each time.
166-201-007 ISMP indicates I2C errors on bus M0.
1. Reseat the following components:
a. Memory card
b. I/O board
c. Microprocessor tray
2. Replace the following components one at a time,
in the order shown, restarting the server each
time.
a. Memory card
b. I/O board
c. (Trained service technician only)
Microprocessor tray
166-201-008 ISMP indicates I2C errors on bus M1.
1. Reseat the following components:
a. Memory card
b. I/O board
c. Microprocessor tray
2. Replace the following components one at a time,
in the order shown, restarting the server each
time.
a. Memory card
b. I/O board
c. (Trained service technician only)
Microprocessor tray
72
IBM System x3950 Type 8878 and System x3950 E Type 8879: Problem Determination and Service Guide