IBM 8488 Hardware Maintenance Manual - Page 125

Option, Symptom, FRU/action, Verify, option, hardware, cable, connections, secure., Power, Reseat,

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Note: See Chapter 7, "Parts listing Type 8488 and 8648," on page 129 to determine which components are replaceable by the customer (CRU), and which components must be replaced by a field service technician (FRU). Option Symptom FRU/action An IBM option that used to work 1. Verify that all of the option hardware and cable connections are secure. does not work now. 2. If the option comes with its own test instructions, use those instructions to test the option. 3. If the failing option is a SCSI option, verify that: v The cables for all external SCSI options are connected correctly. v The last option in each SCSI chain, or the end of the SCSI cable, is terminated correctly. v Any external SCSI option is turned on. You must turn on an external SCSI option before turning on the server. 4. Failing option. Note: See Chapter 7, "Parts listing Type 8488 and 8648," on page 129 to determine which components are replaceable by the customer (CRU), and which components must be replaced by a field service technician (FRU). Power Symptom FRU/action The power switch does not work 1. Reseat the connector. and the reset button, if supported, does work. 2. Power switch card. 3. System board. The server does not turn on. 1. Verify that: v The power cables are properly connected to the server. v The electrical outlet functions properly. v The processors are connected properly. v The type of memory installed is supported by the server, and that functional DIMMs are installed in slots 1 and 2. v If you just installed an option, remove it, and restart the server. If the server now turns on, you might have installed more options than the power supply supports. 2. If LEDs for microprocessors or VRMs are on, verify that: a. A VRM is installed if a second microprocessor is present. b. All microprocessors have the same speed. 3. If server does not turn on: v System board. The server does not turn off. 1. Verify whether you are using an ACPI or non-ACPI operating system. If you are using a non-ACPI operating system: a. Press Ctrl+Alt+Delete. b. Turn off the system by holding the power-control button for 4 seconds. c. If server fails during BIOS POST and power-control button does not work, remove the AC power cord. 2. If the problem remains or if you are using an ACPI-aware operating system, suspect the system board. Chapter 6. Symptom-to-FRU index 115

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Note:
See
Chapter
7,
“Parts
listing
Type
8488
and
8648,”
on
page
129
to
determine
which
components
are
replaceable
by
the
customer
(CRU),
and
which
components
must
be
replaced
by
a
field
service
technician
(FRU).
Option
Symptom
FRU/action
An
IBM
option
that
used
to
work
does
not
work
now.
1.
Verify
that
all
of
the
option
hardware
and
cable
connections
are
secure.
2.
If
the
option
comes
with
its
own
test
instructions,
use
those
instructions
to
test
the
option.
3.
If
the
failing
option
is
a
SCSI
option,
verify
that:
v
The
cables
for
all
external
SCSI
options
are
connected
correctly.
v
The
last
option
in
each
SCSI
chain,
or
the
end
of
the
SCSI
cable,
is
terminated
correctly.
v
Any
external
SCSI
option
is
turned
on.
You
must
turn
on
an
external
SCSI
option
before
turning
on
the
server.
4.
Failing
option.
Note:
See
Chapter
7,
“Parts
listing
Type
8488
and
8648,”
on
page
129
to
determine
which
components
are
replaceable
by
the
customer
(CRU),
and
which
components
must
be
replaced
by
a
field
service
technician
(FRU).
Power
Symptom
FRU/action
The
power
switch
does
not
work
and
the
reset
button,
if
supported,
does
work.
1.
Reseat
the
connector.
2.
Power
switch
card.
3.
System
board.
The
server
does
not
turn
on.
1.
Verify
that:
v
The
power
cables
are
properly
connected
to
the
server.
v
The
electrical
outlet
functions
properly.
v
The
processors
are
connected
properly.
v
The
type
of
memory
installed
is
supported
by
the
server,
and
that
functional
DIMMs
are
installed
in
slots
1
and
2.
v
If
you
just
installed
an
option,
remove
it,
and
restart
the
server.
If
the
server
now
turns
on,
you
might
have
installed
more
options
than
the
power
supply
supports.
2.
If
LEDs
for
microprocessors
or
VRMs
are
on,
verify
that:
a.
A
VRM
is
installed
if
a
second
microprocessor
is
present.
b.
All
microprocessors
have
the
same
speed.
3.
If
server
does
not
turn
on:
v
System
board.
The
server
does
not
turn
off.
1.
Verify
whether
you
are
using
an
ACPI
or
non-ACPI
operating
system.
If
you
are
using
a
non-ACPI
operating
system:
a.
Press
Ctrl+Alt+Delete.
b.
Turn
off
the
system
by
holding
the
power-control
button
for
4
seconds.
c.
If
server
fails
during
BIOS
POST
and
power-control
button
does
not
work,
remove
the
AC
power
cord.
2.
If
the
problem
remains
or
if
you
are
using
an
ACPI-aware
operating
system,
suspect
the
system
board.
Chapter
6.
Symptom-to-FRU
index
115