IBM 8676 Hardware Maintenance Manual - Page 104

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

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Page 104 highlights

Note: See "System" on page 112 to determine which components should be replaced by a field service technician. Power problems Symptom FRU/action 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 type of memory installed is correct. 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 CPUs 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. Override front panel power button: a. Disconnect server power cords. b. Install a jumper on the force power-on jumper J27 (The J27 jumper is located about 2 inches to the right of J28 and has ″FO″ silk-screened to the front of it.). c. Reconnect power cords. If server turns on: a. Service processor error. b. Operator information card. If server does not turn on: a. Power supply b. System board 4. See "Undetermined problems" on page 109. 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. Note: See "System" on page 112 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. 94 xSeries 335 Type 8676, Type 8830: Hardware Maintenance Manual and Troubleshooting Guide

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Note:
See
“System”
on
page
112
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Power
problems
Symptom
FRU/action
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
type
of
memory
installed
is
correct.
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
CPUs
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.
Override
front
panel
power
button:
a.
Disconnect
server
power
cords.
b.
Install
a
jumper
on
the
force
power-on
jumper
J27
(The
J27
jumper
is
located
about
2
inches
to
the
right
of
J28
and
has
″
FO
″
silk-screened
to
the
front
of
it.).
c.
Reconnect
power
cords.
If
server
turns
on:
a.
Service
processor
error.
b.
Operator
information
card.
If
server
does
not
turn
on:
a.
Power
supply
b.
System
board
4.
See
“Undetermined
problems”
on
page
109.
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.
Note:
See
“System”
on
page
112
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.
94
xSeries
335
Type
8676,
Type
8830:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide