Intermittent
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
A
problem
occurs
only
occasionally
and
is
difficult
to
diagnose.
1.
Make
sure
that:
v
All
cables
and
cords
are
connected
securely
to
the
rear
of
the
server
and
attached
devices.
Attention:
In
a
dc
power
environment,
only
trained
service
personnel
other
than
Lenovo
service
technicians
are
authorized
to
connect
or
disconnect
power
to
the
dc
power
supply.
See
the
documentation
that
comes
with
each
dc
power
supply.
v
When
the
server
is
turned
on,
air
is
flowing
from
the
fan
grille.
If
there
is
no
airflow,
the
fans
are
not
working.
This
can
cause
the
server
to
overheat
and
shut
down.
2.
Check
the
system
event/error
log
or
BMC
system
event
log
(see
“Error
Logs”
in
the
Hardware
Maintenance
Manual
).
The
server
resets
(restarts)
occasionally
1.
If
the
reset
occurs
during
POST
and
the
POST
watchdog
timer
is
enabled
(click
Advanced
Setup
-->
Baseboard
Management
Controller
(BMC)
Setting
-->
BMC
Post
Watchdog
in
the
Configuration/Setup
Utility
program
to
see
the
POST
watchdog
setting),
make
sure
that
sufficient
time
is
allowed
in
the
watchdog
timeout
value
(
BMC
POST
Watchdog
Timeout
).
See
the
User
Guide
for
information
about
the
settings
in
the
Configuration/Setup
Utility
program.
If
the
server
continues
to
reset
during
POST,
see
the
“POST”
and
“Diagnostic
programs”
sections
in
the
Hardware
Maintenance
Manual
.
2.
If
the
reset
occurs
after
the
operating
system
starts,
disable
any
automatic
server
restart
(ASR)
utilities,
such
as
the
IBM
Automatic
Server
Restart
IPMI
Application
for
Windows,
or
ASR
devices
that
may
be
installed.
Note:
ASR
utilities
operate
as
operating-system
utilities
and
are
related
to
the
IPMI
device
driver.
If
the
reset
continues
to
occur
after
the
operating
system
starts,
the
operating
system
might
have
a
problem;
see
“Software
problems”
on
page
76.
3.
If
neither
condition
applies,
check
the
system
event/error
log
or
BMC
system
event
log
(see
“Error
Logs”
in
the
Hardware
Maintenance
Manual
).
Chapter
5.
Solving
problems
67
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