IBM 8671 Hardware Maintenance Manual - Page 126

System, board

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Note: 0.01mL is one tick mark on the syringe. If the grease is properly applied, approximately half (0.22mL) of the grease will remain in the syringe. 6. Install the heat sink onto the microprocessor as described in "Installing an additional microprocessor" on page 82. System board Note: v Read "Installation guidelines" on page 45. v Read the safety notices at "Safety information" on page 169. v Read "Handling electrostatic discharge-sensitive devices" on page 172. Attention: Complete the following steps to remove the system board. 1. Turn off the server and any attached devices. Notes: a. When replacing the system board, you must either update the system with the latest firmware or restore the pre-existing firmware that the customer provides on a diskette or CD image. b. When replacing the system board in a server designed for 400 MHz microprocessors, do not install a system board designed for microprocessors of greater than 400 MHz (see Chapter 7, "Parts listing for the xSeries 235," on page 161). 2. Disconnect external cables and option cables from the back of the server. 3. Lay the server so that the cover is facing up. 4. Remove the cover (see "Removing the left-side cover" on page 55). 5. Disconnect and remove adapters and spacers (see "Working with adapters" on page 60). 6. Remove the two central fans (see "Replacing a hot-swap fan" on page 94). 7. Remove the plastic baffle. 8. Remove the adapter support bracket (see "Removing and installing the adapter-support bracket" on page 58). 9. Disconnect all cables from the system board. Note: Place all disconnected cables carefully to the side so that they do not come in contact with the center of the system board. 10. Remove all microprocessors and VRMs and set them aside on a static-protected surface for reinstallation (see "Microprocessor removal" on page 117). 11. Remove the memory modules and set them aside on a static-protected surface for reinstallation (see "Installing memory modules" on page 80). Note: When you set the DIMMs aside, be sure to keep track of the slots they belong to; DIMMs must be installed in pairs of the same size, speed, type, and technology. 116 xSeries 235 Type 8671: Hardware Maintenance Manual and Troubleshooting Guide

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Note:
0.01mL
is
one
tick
mark
on
the
syringe.
If
the
grease
is
properly
applied,
approximately
half
(0.22mL)
of
the
grease
will
remain
in
the
syringe.
6.
Install
the
heat
sink
onto
the
microprocessor
as
described
in
“Installing
an
additional
microprocessor”
on
page
82.
System
board
Note:
v
Read
“Installation
guidelines”
on
page
45.
v
Read
the
safety
notices
at
“Safety
information”
on
page
169.
v
Read
“Handling
electrostatic
discharge-sensitive
devices”
on
page
172.
Attention:
Complete
the
following
steps
to
remove
the
system
board.
1.
Turn
off
the
server
and
any
attached
devices.
Notes:
a.
When
replacing
the
system
board,
you
must
either
update
the
system
with
the
latest
firmware
or
restore
the
pre-existing
firmware
that
the
customer
provides
on
a
diskette
or
CD
image.
b.
When
replacing
the
system
board
in
a
server
designed
for
400
MHz
microprocessors,
do
not
install
a
system
board
designed
for
microprocessors
of
greater
than
400
MHz
(see
Chapter
7,
“Parts
listing
for
the
xSeries
235,”
on
page
161).
2.
Disconnect
external
cables
and
option
cables
from
the
back
of
the
server.
3.
Lay
the
server
so
that
the
cover
is
facing
up.
4.
Remove
the
cover
(see
“Removing
the
left-side
cover”
on
page
55).
5.
Disconnect
and
remove
adapters
and
spacers
(see
“Working
with
adapters”
on
page
60).
6.
Remove
the
two
central
fans
(see
“Replacing
a
hot-swap
fan”
on
page
94).
7.
Remove
the
plastic
baffle.
8.
Remove
the
adapter
support
bracket
(see
“Removing
and
installing
the
adapter-support
bracket”
on
page
58).
9.
Disconnect
all
cables
from
the
system
board.
Note:
Place
all
disconnected
cables
carefully
to
the
side
so
that
they
do
not
come
in
contact
with
the
center
of
the
system
board.
10.
Remove
all
microprocessors
and
VRMs
and
set
them
aside
on
a
static-protected
surface
for
reinstallation
(see
“Microprocessor
removal”
on
page
117).
11.
Remove
the
memory
modules
and
set
them
aside
on
a
static-protected
surface
for
reinstallation
(see
“Installing
memory
modules”
on
page
80).
Note:
When
you
set
the
DIMMs
aside,
be
sure
to
keep
track
of
the
slots
they
belong
to;
DIMMs
must
be
installed
in
pairs
of
the
same
size,
speed,
type,
and
technology.
116
xSeries
235
Type
8671:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide