v
Check
the
LAN
activity
LED
on
the
rear
of
the
server.
The
LAN
activity
LED
is
lit
when
data
is
active
on
the
Ethernet
network.
If
the
LAN
activity
LED
is
off,
make
sure
that
the
hub
and
network
are
operating
and
that
the
correct
device
drivers
are
installed.
v
Make
sure
that
you
are
using
the
correct
device
drivers,
which
come
with
the
server.
v
Check
for
operating-system-specific
causes
for
the
problem.
v
Make
sure
that
the
device
drivers
on
the
client
and
server
are
using
the
same
protocol.
If
the
Ethernet
controller
still
cannot
connect
to
the
network
but
the
hardware
appears
to
be
working,
the
network
administrator
must
investigate
other
possible
sources
of
the
error.
Solving
undetermined
problems
Use
the
information
in
this
section
if
the
diagnostic
tests
did
not
diagnose
the
failure
or
if
the
server
is
inoperative.
If
you
suspect
that
a
software
problem
is
causing
failures
(continuous
or
intermittent),
see
“Software
problems”
on
page
100.
Damaged
data
in
CMOS
memory
or
damaged
BIOS
code
can
cause
undetermined
problems.
To
reset
the
CMOS
data,
use
the
password
override
jumper
to
override
the
power-on
password
and
clear
the
CMOS
memory;
see
“I/O
board
internal
connectors
and
jumpers”
on
page
8.
If
you
suspect
that
the
BIOS
code
is
damaged,
see
“Recovering
from
a
BIOS
update
failure”
on
page
129.
Damaged
memory
card
connector
pins
or
improperly
installed
memory
cards
can
prevent
the
server
from
starting
or
might
cause
a
POST
checkpoint
halt.
For
example,
a
memory
card
that
is
not
completely
installed
or
has
bent
connector
pins
might
cause
the
server
to
continually
restart
or
display
an
F2
checkpoint
halt.
Remove
and
inspect
all
memory
card
connector
pins
for
bent
or
damaged
interface
pins.
Replace
all
memory
cards
that
have
damaged
pins
and
ensure
that
the
card
is
completely
latched
into
place.
Check
the
LEDs
on
all
the
power
supplies
(see
“Power-supply
LEDs”
on
page
108).
If
the
LEDs
indicate
that
the
power
supplies
are
working
correctly,
complete
the
following
steps:
1.
Turn
off
the
server.
2.
Make
sure
that
the
server
is
cabled
correctly.
3.
Remove
or
disconnect
the
following
devices,
one
at
a
time,
until
you
find
the
failure.
Turn
on
the
server
and
reconfigure
it
each
time.
v
Any
external
devices.
v
Surge-suppressor
device
(on
the
server).
v
Modem,
printer,
mouse,
and
non-IBM
devices.
v
Each
adapter.
v
Hard
disk
drives.
v
Memory
modules.
The
minimum
configuration
requirement
is
2
GB
(two
1
GB
DIMMs).
v
Service
processor.
The
following
minimum
configuration
is
required
for
the
server
to
turn
on:
v
One
microprocessor
v
Two
1
GB
DIMMs
on
the
memory
card
v
One
power
supply
156
IBM
System
x3850
Type
8864:
Problem
Determination
and
Service
Guide
Содержание 88643RU - System x3850 - 8864
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