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
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
(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
control-panel
assembly
power-control
button
is
working
correctly:
a.
Disconnect
the
server
power
cords.
b.
Reconnect
the
power
cords.
c.
Press
the
power-control
button.
If
the
server
does
not
start,
check
the
power-control
button
for
damage.
2.
Make
sure
that:
v
The
power
cords
are
correctly
connected
to
the
server
and
to
a
working
electrical
outlet.
v
The
power
LEDs
(AC,
DC)
are
lit
correctly.
v
The
server
power-on
LED
on
the
front
information
panel
is
flashing
after
AC
power
cord
is
connected
and
that
it
stays
on
after
the
power-button
is
pressed.
v
The
server
contains
the
correct
type
of
DIMMs.
v
The
DIMMs
are
correctly
seated.
v
A
POST
beep
code
did
not
sound,
indicating
a
memory
initialization
error.
v
The
LEDs
on
the
power
supply
do
not
indicate
a
problem.
v
The
microprocessor
is
correctly
installed.
3.
Reseat
the
following
components:
a.
DIMMs
b.
Power-supply
cables
to
all
internal
components
c.
Power
supplies
(hot-swap
models)
4.
Replace
the
following
components
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time:
a.
DIMMs
b.
Power
supplies
(hot-swap
models)
c.
(Trained
service
technician
only)
Power
supply
(non-hot
swap
models)
5.
If
you
just
installed
an
optional
device,
remove
it,
and
restart
the
server.
If
the
server
now
starts,
you
might
have
installed
more
devices
than
the
power
supply
supports.
6.
See
The
server
does
not
turn
off.
1.
Determine
whether
you
are
using
an
Advanced
Configuration
and
Power
Interface
(ACPI)
or
a
non-ACPI
operating
system.
If
you
are
using
a
non-ACPI
operating
system,
complete
the
following
steps:
a.
Press
Ctrl+Alt+Delete.
b.
Turn
off
the
server
by
holding
the
power-control
button
for
5
seconds.
c.
Restart
the
server.
d.
If
the
server
fails
POST
and
the
power-control
button
does
not
work,
disconnect
the
ac
power
cord
for
20
seconds;
then,
reconnect
the
ac
power
cord
and
restart
the
server.
2.
(Trained
service
technician
only)
If
the
problem
remains
or
if
you
are
using
an
ACPI-aware
operating
system,
suspect
the
system
board.
Chapter
2.
Diagnostics
51
Summary of Contents for System x3400 Type 7973
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