IBM System x3755Types 7163, Problem Determination And Service Manual

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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 3, “Parts listing, System x3755 Type 8877 and 7163,” on page 25 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
Sensor
number Sensor
type
Action
VRD 5V
Assertion 01 (Power unit
failure)
28 08
1. Remove the following components one at a time, in the order
shown, restarting the server each time to isolate the failing
component:
a. Keyboard, mouse, and USB devices
b. DASD devices
c. PCI adapters
d. DVD drive
2. If the problems remains:
a. Inspect the SAS power cable and the IDE power cable.
b. Inspect the front panel USB cable.
c. (Trained service technician only) Replace the I/O board,
see “Removing the I/O board assembly” on page 68 and
“Replacing the I/O board assembly” on page 69.
VRD 3.3V
Assertion 00 (Presence
detected)
29 08 Information only
VRD 3.3V
Assertion 01 (Power unit
failure)
29 08
1. Remove the PCI adapters one at a time, to isolate the failing
component.
2. Inspect the IDE power cable.
3. (Trained service technician only) Replace the I/O board, see
“Removing the I/O board assembly” on page 68 and
“Replacing the I/O board assembly” on page 69.
4. Replace the SAS backplane assembly.
VRD 2.5V
Assertion 00 (Presence
detected)
2A 08 Information only
VRD 2.5V
Assertion 01 (Power unit
failure)
2A 08
1. Reseat the microprocessor/memory cards, see “Removing a
microprocessor/memory card” on page 51 and “Replacing a
microprocessor/memory card” on page 51.
2. (Trained service technician only) Replace the I/O board, see
“Removing the I/O board assembly” on page 68 and
“Replacing the I/O board assembly” on page 69.
VRD 2.1V
Assertion 00 (Presence
detected)
2B 08 Information only
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IBM System x3755 Type 8877 and 7163: Problem Determination and Service Guide