IBM 79856au Installation Guide - Page 85

Serial, problems

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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 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 server unexpectedly shuts down, and the LEDs on the operator information panel are not lit. See "Solving undetermined problems" in the Problem Determination and Service Guide. Serial port 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 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 number of serial ports that are identified by the operating system is less than the number of installed serial ports. 1. Make sure that: v Each port is assigned a unique address in the Configuration/Setup Utility program and none of the serial ports is disabled. v The serial-port adapter (if one is installed) is seated correctly. 2. Reseat the serial port adapter. 3. Replace the serial port adapter. A serial device does not work. 1. Make sure that: v The device is compatible with the server. v The serial port is enabled and is assigned a unique address. v The device is connected to the correct connector (see "Rear view" on page 35). 2. Reseat the following components: a. Failing serial device b. Serial cable c. Remote Supervisor Adapter II SlimLine (if one is installed) 3. Replace the components listed in step 2 one at a time, in the order shown, restarting the server each time. Chapter 5. Solving problems 71

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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
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
server
unexpectedly
shuts
down,
and
the
LEDs
on
the
operator
information
panel
are
not
lit.
See
“Solving
undetermined
problems”
in
the
Problem
Determination
and
Service
Guide
.
Serial
port
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
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
number
of
serial
ports
that
are
identified
by
the
operating
system
is
less
than
the
number
of
installed
serial
ports.
1.
Make
sure
that:
v
Each
port
is
assigned
a
unique
address
in
the
Configuration/Setup
Utility
program
and
none
of
the
serial
ports
is
disabled.
v
The
serial-port
adapter
(if
one
is
installed)
is
seated
correctly.
2.
Reseat
the
serial
port
adapter.
3.
Replace
the
serial
port
adapter.
A
serial
device
does
not
work.
1.
Make
sure
that:
v
The
device
is
compatible
with
the
server.
v
The
serial
port
is
enabled
and
is
assigned
a
unique
address.
v
The
device
is
connected
to
the
correct
connector
(see
“Rear
view”
on
page
35).
2.
Reseat
the
following
components:
a.
Failing
serial
device
b.
Serial
cable
c.
Remote
Supervisor
Adapter
II
SlimLine
(if
one
is
installed)
3.
Replace
the
components
listed
in
step
2
one
at
a
time,
in
the
order
shown,
restarting
the
server
each
time.
Chapter
5.
Solving
problems
71