1.
Turn
off
the
server
and
disconnect
all
ac
power
cords.
2.
Check
for
loose
cables
in
the
power
subsystem.
Also
check
for
short
circuits,
for
example,
if
a
loose
screw
is
causing
a
short
circuit
on
a
circuit
board.
3.
If
a
power-channel
error
LED
on
the
system
board
is
lit,
perform
the
following
steps;
otherwise,
go
to
step
4.
See
“System-board
LEDs”
on
page
15
for
the
location
of
the
power-channel
error
LEDs.
Table
4
identifies
the
components
associated
with
each
power
channel,
and
the
order
in
which
to
troubleshoot
the
components.
a.
Disconnect
the
cables
and
power
cords
to
all
internal
and
external
devices.
Leave
the
power-supply
cords
connected.
b.
Remove
each
component
that
is
associated
with
the
LED,
one
at
a
time,
in
the
sequence
indicated
in
Table
4,
restarting
the
server
each
time,
until
the
cause
of
the
overcurrent
condition
is
identified.
Important:
Only
a
trained
service
technician
should
remove
or
replace
a
FRU,
such
as
a
microprocessor
or
the
system
board.
See
Chapter
3,
“Parts
listing,
Type
7979
and
1914
server,”
on
page
79
to
determine
whether
a
component
is
a
FRU.
Table
4.
Components
associated
with
power-channel
error
LEDs
Power-channel
error
LED
Components
A
Fan
4,
fan
6,
fan
8,
fan
9,
microprocessor
1,
system
board
(integrated
voltage
regulator)
B
Fan
1,
fan
2,
fan
3,
fan
5,
VRM,
IDE
CD/DVD
cable,
IDE
CD/DVD
media
backplane,
microprocessor
2,
system
board
C
ServeRAID
SAS
controller
(8k
or
8k-l),
DIMMs,
tape
power
(connector
J100),
system
board
D
Low-profile
PCI
Express
adapter
(PCI
slots
3
and
4),
adapter
on
PCI
riser
card
(PCI
slots
1
and
2),
system
board
c.
Replace
the
identified
component.
4.
Remove
the
adapters
and
disconnect
the
cables
and
power
cords
to
all
internal
and
external
devices
until
the
server
is
at
the
minimum
configuration
that
is
required
for
the
server
to
start
(see
“Solving
undetermined
problems”
on
page
76
for
the
minimum
configuration).
5.
Reconnect
all
ac
power
cords
and
turn
on
the
server.
If
the
server
starts
successfully,
replace
the
adapters
and
devices
one
at
a
time
until
the
problem
is
isolated.
If
the
server
does
not
start
from
the
minimum
configuration,
replace
the
components
in
the
minimum
configuration
one
at
a
time
until
the
problem
is
isolated.
Solving
Ethernet
controller
problems
The
method
that
you
use
to
test
the
Ethernet
controller
depends
on
which
operating
system
you
are
using.
See
the
operating-system
documentation
for
information
about
Ethernet
controllers,
and
see
the
Ethernet
controller
device-driver
readme
file.
Try
the
following
procedures:
v
Make
sure
that
the
correct
device
drivers,
which
come
with
the
server,
are
installed
and
that
they
are
at
the
latest
level.
v
Make
sure
that
the
Ethernet
cable
is
installed
correctly.
Chapter
2.
Diagnostics
75
Summary of Contents for System x3650 Type 7979
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