Lenovo J105 Hardware Maintenance Manual - Page 131

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10. Position the system board so that the screws holes are aligned and install the system board screws. 11. Install the hard disk drive. Make sure to route the power supply cable for the system board underneath the hard disk drive. See "Replacing the hard disk drive" on page 139. 12. Reconnect all other power supply cables to the system board and the drives. See "Identifying parts on the system board" on page 116. Make sure the cables are correctly routed. 13. Replace the drive bay assembly. See "Removing and replacing the drive bay assembly" on page 119. 14. Go to "Completing the FRU replacement." on page 143. Replacing the system board (Types 8453, 8454, 8455, 8456, and 8457) Note: When replacing the system board, a new retention bracket for the microprocessor heat sink is required. Make sure you have a new retention bracket before beginning this procedure. 1. Remove the cover. See "Removing the cover" on page 114 2. Lift the fan duct off the heat sink fan. 3. Remove any adapter cards installed in the PCI connectors. See "Replacing a PCI adapter" on page 121. 4. Remove the drive bay assembly. See "Removing and replacing the drive bay assembly" on page 119. 5. Take note of the location of all cable connections on the system board and disconnect all cables. See "Identifying parts on the system board" on page 116. 6. Remove the hard disk drive. See "Replacing the hard disk drive" on page 139. 7. Remove the screws that secure the system board to the chassis. 8. Lift the system board out of the chassis. 9. Remove the memory modules from the failing system board and install them in the same location on the new system board. 10. Disconnect the heat sink and fan assembly cable from the system board. See "Identifying parts on the system board" on page 116. Chapter 9. Replacing FRUs (Types 8453, 8454, 8455, 8456, 8457, 8458, 8459, and 8460) 125

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10.
Position
the
system
board
so
that
the
screws
holes
are
aligned
and
install
the
system
board
screws.
11.
Install
the
hard
disk
drive.
Make
sure
to
route
the
power
supply
cable
for
the
system
board
underneath
the
hard
disk
drive.
See
“Replacing
the
hard
disk
drive”
on
page
139.
12.
Reconnect
all
other
power
supply
cables
to
the
system
board
and
the
drives.
See
“Identifying
parts
on
the
system
board”
on
page
116.
Make
sure
the
cables
are
correctly
routed.
13.
Replace
the
drive
bay
assembly.
See
“Removing
and
replacing
the
drive
bay
assembly”
on
page
119.
14.
Go
to
“Completing
the
FRU
replacement.”
on
page
143.
Replacing
the
system
board
(Types
8453,
8454,
8455,
8456,
and
8457)
Note:
When
replacing
the
system
board,
a
new
retention
bracket
for
the
microprocessor
heat
sink
is
required.
Make
sure
you
have
a
new
retention
bracket
before
beginning
this
procedure.
1.
Remove
the
cover.
See
“Removing
the
cover”
on
page
114
2.
Lift
the
fan
duct
off
the
heat
sink
fan.
3.
Remove
any
adapter
cards
installed
in
the
PCI
connectors.
See
“Replacing
a
PCI
adapter”
on
page
121.
4.
Remove
the
drive
bay
assembly.
See
“Removing
and
replacing
the
drive
bay
assembly”
on
page
119.
5.
Take
note
of
the
location
of
all
cable
connections
on
the
system
board
and
disconnect
all
cables.
See
“Identifying
parts
on
the
system
board”
on
page
116.
6.
Remove
the
hard
disk
drive.
See
“Replacing
the
hard
disk
drive”
on
page
139.
7.
Remove
the
screws
that
secure
the
system
board
to
the
chassis.
8.
Lift
the
system
board
out
of
the
chassis.
9.
Remove
the
memory
modules
from
the
failing
system
board
and
install
them
in
the
same
location
on
the
new
system
board.
10.
Disconnect
the
heat
sink
and
fan
assembly
cable
from
the
system
board.
See
“Identifying
parts
on
the
system
board”
on
page
116.
Chapter
9.
Replacing
FRUs
(Types
8453,
8454,
8455,
8456,
8457,
8458,
8459,
and
8460)
125