IBM 88643RU Service Guide - Page 155

IBM 88643RU - System x3850 - 8864 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, Type 8864," on page 23 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. System-error log message Action Power supply current exceeded max spec value 1. Install another power supply (if possible) and make sure that ac power cords are correctly connected. 2. Remove devices that consume an extraordinary amount of power. 3. Replace the power backplane. Power Supply X 12V Over Current Fault 1. Power supply 2. Power backplane Power Supply X 12V Over Voltage Fault 1. Power supply 2. Power backplane Power Supply X 12V Under Voltage Fault 1. Power supply 2. Power backplane Power Supply X AC Power Removed 1. Connect the ac power cord to power supply X. 2. Replace power supply X. Power Supply X Current Fault 1. Power supply 2. Power backplane Power Supply X DC Good Fault 1. If the system power present LED is lit, reduce the server to the minimum configuration (see page 156) and replace components one at a time to isolate the fault. 2. Reseat the following components: a. Power supply b. Power backplane 3. Replace the components listed in step 2 one at a time, in the order shown, restarting the server each time. Power Supply X Removed 1. Reseat power supply X. 2. Replace power supply X. 3. Replace the power backplane. Power Supply X Temperature Fault 1. Make sure that the fan air intake areas are clear and well ventilated. 2. Make sure that all fans are installed and functioning. 3. Reseat power supply X. 4. Replace power supply X. QA Cache 1.8V Power Good Fault 1. Reseat the microprocessor tray. 2. (Trained service technician only) Reseat the microprocessors. 3. Reseat the microprocessor VRMs, if present. 4. (Trained service technician only) Replace the microprocessor tray. Chapter 5. Diagnostics 139

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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,
Type
8864,”
on
page
23
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.
System-error
log
message
Action
Power
supply
current
exceeded
max
spec
value
1.
Install
another
power
supply
(if
possible)
and
make
sure
that
ac
power
cords
are
correctly
connected.
2.
Remove
devices
that
consume
an
extraordinary
amount
of
power.
3.
Replace
the
power
backplane.
Power
Supply
X
12V
Over
Current
Fault
1.
Power
supply
2.
Power
backplane
Power
Supply
X
12V
Over
Voltage
Fault
1.
Power
supply
2.
Power
backplane
Power
Supply
X
12V
Under
Voltage
Fault
1.
Power
supply
2.
Power
backplane
Power
Supply
X
AC
Power
Removed
1.
Connect
the
ac
power
cord
to
power
supply
X.
2.
Replace
power
supply
X.
Power
Supply
X
Current
Fault
1.
Power
supply
2.
Power
backplane
Power
Supply
X
DC
Good
Fault
1.
If
the
system
power
present
LED
is
lit,
reduce
the
server
to
the
minimum
configuration
(see
page
156)
and
replace
components
one
at
a
time
to
isolate
the
fault.
2.
Reseat
the
following
components:
a.
Power
supply
b.
Power
backplane
3.
Replace
the
components
listed
in
step
2
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time.
Power
Supply
X
Removed
1.
Reseat
power
supply
X.
2.
Replace
power
supply
X.
3.
Replace
the
power
backplane.
Power
Supply
X
Temperature
Fault
1.
Make
sure
that
the
fan
air
intake
areas
are
clear
and
well
ventilated.
2.
Make
sure
that
all
fans
are
installed
and
functioning.
3.
Reseat
power
supply
X.
4.
Replace
power
supply
X.
QA
Cache
1.8V
Power
Good
Fault
1.
Reseat
the
microprocessor
tray.
2.
(Trained
service
technician
only)
Reseat
the
microprocessors.
3.
Reseat
the
microprocessor
VRMs,
if
present.
4.
(Trained
service
technician
only)
Replace
the
microprocessor
tray.
Chapter
5.
Diagnostics
139