IBM 7985, 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 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
Sensor
number
Sensor
type Action
VRD 3 status
Assertion 00 (Presence
detected)
26 08 Information only
VRD 3 status
Assertion 01 (Power unit
failure)
26 08
1. (Trained service technician only) Reseat the microprocessor.
2. (Trained service technician only) Replace the microprocessor.
VRD 4 status
Assertion 00 (Presence
detected)
27 08 Information only
VRD 4 status
Assertion 01 (Power unit
failure)
27 08
1. (Trained service technician only) Reseat the microprocessor.
2. (Trained service technician only) Replace the microprocessor.
VRD 5V
Assertion 00 (Presence
detected)
28 08 Information only
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 system
board.
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 system board.
4. Replace the SAS backplane assembly.
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IBM System x3655 Type 7985 and 7943: Problem Determination and Service Guide