IBM 8874 Installation Guide - Page 82

Power, problems

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Power problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See the parts listing in the Problem Determination and Service Guide 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. Symptom Action The power-control button does 1. Make sure that the operator information panel power-control button is working not work, and the reset button correctly: does work (the server does not start). a. Disconnect the server power cords. Note: The power-control button b. Reconnect the power cords. will not function until 20 c. (Trained service technician only) Reseat the operator information panel seconds after the server has cables, and then repeat steps 1a and 1b. been connected to ac power. v (Trained service technician only) If the server starts, reseat the operator information panel. If the problem remains, replace the operator information panel. v (Trained service technician only) If the server does not start, bypass the operator information panel power-control button by using the force power-on jumper; if the server starts, reseat the operator information panel. If the problem remains, replace the operator information panel. 2. Make sure that the reset button is working correctly: a. Disconnect the server power cords. b. Reconnect the power cords. c. (Trained service technician only) Reseat the light path panel cable, and then repeat steps 1a and 1b. v (Trained service technician only) If the server starts, replace the light path panel. v If the server does not start, go to step 3. 3. Make sure that: v The power cords are correctly connected to the server and to a working electrical outlet. v The type of memory that is installed is correct. v The memory card is fully seated. v The LEDs on the power supply do not indicate a problem. v The microprocessors are installed in the correct sequence. 4. Reseat the following components: a. Memory card b. (Trained service technician only) Power switch connector c. (Trained service technician only) Power backplane d. I/O board 5. Replace the components listed in step 4 one at a time, in the order shown, restarting the server each time. 6. If you just installed an optional device, remove it, and restart the server. If the server now turns on, you might have installed more devices than the power supply supports. 70 IBM xSeries 460 Type 8872 and xSeries MXE 460 Type 8874: Installation Guide ERserver

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Power
problems
v
Follow
the
suggested
actions
in
the
order
in
which
they
are
listed
in
the
Action
column
until
the
problem
is
solved.
v
See
the
parts
listing
in
the
Problem
Determination
and
Service
Guide
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.
Symptom
Action
The
power-control
button
does
not
work,
and
the
reset
button
does
work
(the
server
does
not
start).
Note:
The
power-control
button
will
not
function
until
20
seconds
after
the
server
has
been
connected
to
ac
power.
1.
Make
sure
that
the
operator
information
panel
power-control
button
is
working
correctly:
a.
Disconnect
the
server
power
cords.
b.
Reconnect
the
power
cords.
c.
(Trained
service
technician
only)
Reseat
the
operator
information
panel
cables,
and
then
repeat
steps
1a
and
1b.
v
(Trained
service
technician
only)
If
the
server
starts,
reseat
the
operator
information
panel.
If
the
problem
remains,
replace
the
operator
information
panel.
v
(Trained
service
technician
only)
If
the
server
does
not
start,
bypass
the
operator
information
panel
power-control
button
by
using
the
force
power-on
jumper;
if
the
server
starts,
reseat
the
operator
information
panel.
If
the
problem
remains,
replace
the
operator
information
panel.
2.
Make
sure
that
the
reset
button
is
working
correctly:
a.
Disconnect
the
server
power
cords.
b.
Reconnect
the
power
cords.
c.
(Trained
service
technician
only)
Reseat
the
light
path
panel
cable,
and
then
repeat
steps
1a
and
1b.
v
(Trained
service
technician
only)
If
the
server
starts,
replace
the
light
path
panel.
v
If
the
server
does
not
start,
go
to
step
3.
3.
Make
sure
that:
v
The
power
cords
are
correctly
connected
to
the
server
and
to
a
working
electrical
outlet.
v
The
type
of
memory
that
is
installed
is
correct.
v
The
memory
card
is
fully
seated.
v
The
LEDs
on
the
power
supply
do
not
indicate
a
problem.
v
The
microprocessors
are
installed
in
the
correct
sequence.
4.
Reseat
the
following
components:
a.
Memory
card
b.
(Trained
service
technician
only)
Power
switch
connector
c.
(Trained
service
technician
only)
Power
backplane
d.
I/O
board
5.
Replace
the
components
listed
in
step
4
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time.
6.
If
you
just
installed
an
optional
device,
remove
it,
and
restart
the
server.
If
the
server
now
turns
on,
you
might
have
installed
more
devices
than
the
power
supply
supports.
70
IBM
ERserver
xSeries
460
Type
8872
and
xSeries
MXE
460
Type
8874:
Installation
Guide