IBM 8671 Hardware Maintenance Manual - Page 155

Power, problems, Symptom, FRU/action, Verify, whether, using, non-ACPI, operating, system., Serial

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Page 155 highlights

Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Power problems Symptom FRU/action The computer does not turn on. 1. Verify that: v The power cables are properly connected to the computer. v The electrical outlet functions properly. v The type of memory installed is correct. v If you just installed an option, remove it, and restart the computer. If the computer now turns on, you might have installed more options than the power supply supports. 2. Override front panel power button: a. Disconnect computer power cords. b. Reconnect power cords. If computer turns on: a. Operator information panel If computer does not turn on: v System board 3. See "Undetermined problems" on page 157. The computer 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 computer 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. Note: See "System" on page 162 to determine which components should be replaced by a field service technician. Serial port problems Symptom FRU/action The number of serial ports identified by the operating system is less than the number of serial ports installed. 1. Verify that: v Each port is assigned a unique address by the Configuration/Setup Utility program and none of the serial ports is disabled. v The serial-port adapter, if you installed one, is seated properly. 2. Failing serial port adapter. A serial device does not work. 1. Verify that: v The device is compatible with the computer. v The serial port is enabled and is assigned a unique address. v The device is connected to the correct port (see "Input/output connectors" on page 108). 2. Failing serial device. 3. Serial adapter, if installed. 4. System board. Chapter 6. Symptom-to-FRU index 145

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Note:
See
“System”
on
page
162
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Power
problems
Symptom
FRU/action
The
computer
does
not
turn
on.
1.
Verify
that:
v
The
power
cables
are
properly
connected
to
the
computer.
v
The
electrical
outlet
functions
properly.
v
The
type
of
memory
installed
is
correct.
v
If
you
just
installed
an
option,
remove
it,
and
restart
the
computer.
If
the
computer
now
turns
on,
you
might
have
installed
more
options
than
the
power
supply
supports.
2.
Override
front
panel
power
button:
a.
Disconnect
computer
power
cords.
b.
Reconnect
power
cords.
If
computer
turns
on:
a.
Operator
information
panel
If
computer
does
not
turn
on:
v
System
board
3.
See
“Undetermined
problems”
on
page
157.
The
computer
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
computer
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.
Note:
See
“System”
on
page
162
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Serial
port
problems
Symptom
FRU/action
The
number
of
serial
ports
identified
by
the
operating
system
is
less
than
the
number
of
serial
ports
installed.
1.
Verify
that:
v
Each
port
is
assigned
a
unique
address
by
the
Configuration/Setup
Utility
program
and
none
of
the
serial
ports
is
disabled.
v
The
serial-port
adapter,
if
you
installed
one,
is
seated
properly.
2.
Failing
serial
port
adapter.
A
serial
device
does
not
work.
1.
Verify
that:
v
The
device
is
compatible
with
the
computer.
v
The
serial
port
is
enabled
and
is
assigned
a
unique
address.
v
The
device
is
connected
to
the
correct
port
(see
“Input/output
connectors”
on
page
108).
2.
Failing
serial
device.
3.
Serial
adapter,
if
installed.
4.
System
board.
Chapter
6.
Symptom-to-FRU
index
145