IBM x3550 Installation Guide - Page 79

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 on the IBM System x Documentation CD 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). 1. Make sure that the power-control button is working correctly: a. Disconnect the server power cords. b. Reconnect the power cords. Note: The power-control button c. Press the power-control button. will not function until 20 seconds after the server has been connected to ac power. d. If the server does not start, disconnect the server power cords and reseat the operator information panel cables; then, repeat steps 1a through 1c. If the problem remains, replace the operator information panel. 2. Make sure that: v The power cords are correctly connected to the server and to a working electrical outlet. v The server contains the correct type of DIMMs. v The DIMMs are correctly seated. v (Trained service technician only) The microprocessor is correctly installed. 3. 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. 4. Reseat the following components: a. DIMMs b. (Trained service technician only) Power backplane 5. Replace the following components one at a time, in the order shown, restarting the server each time: a. DIMMs b. Power supply c. (Trained service technician only) Power backplane d. (Trained service technician only) System board 6. See "Solving undetermined problems" in the Problem Determination and Service Guide. Chapter 5. Solving problems 65

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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
on
the
IBM
System
x
Documentation
CD
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
power-control
button
is
working
correctly:
a.
Disconnect
the
server
power
cords.
b.
Reconnect
the
power
cords.
c.
Press
the
power-control
button.
d.
If
the
server
does
not
start,
disconnect
the
server
power
cords
and
reseat
the
operator
information
panel
cables;
then,
repeat
steps
1a
through
1c.
If
the
problem
remains,
replace
the
operator
information
panel.
2.
Make
sure
that:
v
The
power
cords
are
correctly
connected
to
the
server
and
to
a
working
electrical
outlet.
v
The
server
contains
the
correct
type
of
DIMMs.
v
The
DIMMs
are
correctly
seated.
v
(Trained
service
technician
only)
The
microprocessor
is
correctly
installed.
3.
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.
4.
Reseat
the
following
components:
a.
DIMMs
b.
(Trained
service
technician
only)
Power
backplane
5.
Replace
the
following
components
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time:
a.
DIMMs
b.
Power
supply
c.
(Trained
service
technician
only)
Power
backplane
d.
(Trained
service
technician
only)
System
board
6.
See
“Solving
undetermined
problems”
in
the
Problem
Determination
and
Service
Guide
.
Chapter
5.
Solving
problems
65