Power problems, Power, Problems – Lenovo 6435 User Manual
Page 67
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
Hardware
Maintenance
Manual
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
through
If
the
problem
remains,
replace
the
operator
information
panel.
2.
Make
sure
that:
v
The
ac
power
cord
is
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
starts,
you
might
have
installed
more
devices
than
the
power
supply
supports.
4.
Reseat
the
following
components:
a.
DIMMs
b.
(Trained
service
technician
only)
Power-supply
cables
to
all
internal
components
c.
(Trained
service
technician
only)
Power
connector
on
the
system
board
5.
Replace
the
following
components
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time:
a.
DIMMs
b.
(Trained
service
technician
only)
Power
supply
c.
(Trained
service
technician
only)
System
board
6.
See
“Solving
undetermined
problems”
in
the
Hardware
Maintenance
Manual
.
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
pressing
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.
If
the
problem
remains
or
if
you
are
using
an
ACPI-aware
operating
system,
suspect
the
system
board.
The
server
unexpectedly
shuts
down,
and
the
LEDs
on
the
operator
information
panel
are
not
lit.
Call
for
service.
Chapter
5.
Solving
problems
53