IBM 8862 Hardware Maintenance Manual - Page 91

Replacing, board, power, backplane, assembly

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Jumper name Description Boot recovery (BIOS) (J19) The default position is pins 1 and 2 (use the primary boot block during startup). Move the jumper to pins 2 and 3 to use the secondary boot block during startup. For more information about recovering the BIOS code, see "Recovering BIOS code" on page 24. Power-on password override (J20) The default position is pins 1 and 2. Changing the position of this jumper to pins 2 and 3 bypasses the power-on password check. Changing the position of this jumper does not affect the administrator password check if an administrator password is set. If the administrator password is lost, the operator information panel must be replaced. Disable Wake on LAN (J24) IXA voltage (J26) For more information about passwords, see "Password override jumper" on page 25 and the section on using passwords in the User's Guide on the IBM xSeries Documentation CD. The default position is pins 1 and 2. Move the jumper to pins 2 and 3 to prevent a Wake on LAN (WOL) packet from waking the system when the system is in the powered-off state. The default position is pins 1 and 2. Move the jumper to pins 2 and 3 when an IXA adapter is installed in PCI slot 3. Replacing the I/O board and power backplane assembly This section contains information about replacing the I/O board and power backplane assembly. Note: v v v Read "Installation guidelines" on page 29. Read "Safety information" on page 147. Read "Handling static-sensitive devices" on page 30. Complete the following steps to remove the I/O board and power backplane assembly: 1. Turn off the server and all peripheral devices; then, disconnect all power cords and external cables. Note: The Remote Supervisor Adapter II has external cable connections that must also be disconnected. 2. Remove the top cover (see "Removing the cover and bezel" on page 32). 3. Remove all fans. 4. Remove the memory cassette. 5. Lift the microprocessor-tray release latch. 6. Remove the microprocessor tray assembly (see "Microprocessor tray assembly" on page 68). Attention: The microprocessor tray is heavy. Pull the tray part-way out of the server, reposition your hands to grasp the body of the tray, and then pull the tray out the rest of the way. 7. Remove the power supplies (see steps 4a on page 52 through 4c on page 52 at "Installing a hot-swap power supply" on page 51). 8. Disconnect all cables from the I/O board. Chapter 5. FRU information (service only) 81

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Jumper
name
Description
Boot
recovery
(BIOS)
(J19)
The
default
position
is
pins
1
and
2
(use
the
primary
boot
block
during
startup).
Move
the
jumper
to
pins
2
and
3
to
use
the
secondary
boot
block
during
startup.
For
more
information
about
recovering
the
BIOS
code,
see
“Recovering
BIOS
code”
on
page
24.
Power-on
password
override
(J20)
The
default
position
is
pins
1
and
2.
Changing
the
position
of
this
jumper
to
pins
2
and
3
bypasses
the
power-on
password
check.
Changing
the
position
of
this
jumper
does
not
affect
the
administrator
password
check
if
an
administrator
password
is
set.
If
the
administrator
password
is
lost,
the
operator
information
panel
must
be
replaced.
For
more
information
about
passwords,
see
“Password
override
jumper”
on
page
25
and
the
section
on
using
passwords
in
the
User’s
Guide
on
the
IBM
xSeries
Documentation
CD.
Disable
Wake
on
LAN
(J24)
The
default
position
is
pins
1
and
2.
Move
the
jumper
to
pins
2
and
3
to
prevent
a
Wake
on
LAN
(WOL)
packet
from
waking
the
system
when
the
system
is
in
the
powered-off
state.
IXA
voltage
(J26)
The
default
position
is
pins
1
and
2.
Move
the
jumper
to
pins
2
and
3
when
an
IXA
adapter
is
installed
in
PCI
slot
3.
Replacing
the
I/O
board
and
power
backplane
assembly
This
section
contains
information
about
replacing
the
I/O
board
and
power
backplane
assembly.
Note:
v
Read
“Installation
guidelines”
on
page
29.
v
Read
“Safety
information”
on
page
147.
v
Read
“Handling
static-sensitive
devices”
on
page
30.
Complete
the
following
steps
to
remove
the
I/O
board
and
power
backplane
assembly:
1.
Turn
off
the
server
and
all
peripheral
devices;
then,
disconnect
all
power
cords
and
external
cables.
Note:
The
Remote
Supervisor
Adapter
II
has
external
cable
connections
that
must
also
be
disconnected.
2.
Remove
the
top
cover
(see
“Removing
the
cover
and
bezel”
on
page
32).
3.
Remove
all
fans.
4.
Remove
the
memory
cassette.
5.
Lift
the
microprocessor-tray
release
latch.
6.
Remove
the
microprocessor
tray
assembly
(see
“Microprocessor
tray
assembly”
on
page
68).
Attention:
The
microprocessor
tray
is
heavy.
Pull
the
tray
part-way
out
of
the
server,
reposition
your
hands
to
grasp
the
body
of
the
tray,
and
then
pull
the
tray
out
the
rest
of
the
way.
7.
Remove
the
power
supplies
(see
steps
4a
on
page
52
through
4c
on
page
52
at
“Installing
a
hot-swap
power
supply”
on
page
51).
8.
Disconnect
all
cables
from
the
I/O
board.
Chapter
5.
FRU
information
(service
only)
81