IBM 7985 Problem Determination And Service Manual page 97

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.
BMC log message
VRD 2.5V
Assertion 00 (Presence
detected)
VRD 2.5V
Assertion 01 (Power unit
failure)
VRD 2.1V
Assertion 00 (Presence
detected)
VRD 2.1V
Assertion 01 (Power unit
failure)
12V faults
VRD 1.8V
Assertion 00 (Presence
detected)
VRD 1.8V
Assertion 01 (Power unit
failure)
VRD 1.4V
Assertion 00 (Presence
detected)
VRD 1.4V
Assertion 01 (Power unit
failure)
VRD 1.2V
Assertion 00 (Presence
detected)
Sensor Sensor
number type Action
2A 08 Information only
2A 08
1. (Trained service technician only) Reseat the microprocessor.
2. (Trained service technician only) Replace the system board.
2B 08 Information only
2B 08
1. Inspect the SAS power cable.
2. Replace the SAS backplane assembly.
3. (Trained service technician only) Replace the system board.
2C 09 (Trained service technician only) Replace the system board.
2D 08 Information only
2D 08
1. Reseat the following components:
2. Replace the following components one at a time, in the order
Note: This power unit supplies power to the system board and
the SAS backplane.
2E 08 Information only
2E 08
1. Inspect the SAS power cable.
2. Replace the SAS backplane assembly.
3. (Trained service technician only) Replace the system board.
2F 08 Information only
a. (Trained service technician only) Microprocessor
b. Power supply
shown, restarting the server each time:
a. (Trained service technician only) Microprocessor
b. Power supply
c. (Trained service technician only) system board
79
Chapter 3. Diagnostics