Lenovo ThinkCentre M50e Hardware Maintenance Manual - Page 105

Removing, replacing, system, board, microprocessor

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Removing and replacing the system board 1. Remove the cover. See "Removing the cover" on page 92. 2. Remove any PCI adapters installed. See "Removing and replacing a PCI adapter" on page 96. 3. Remove any air baffles or ducts. 4. Carefully take note of the location of all cable connections on the system board. It will be necessary to reconnect them properly when installing a new system board. See "Identifying parts on the system board" on page 95. 5. Disconnect all cables connected to the system board. 6. Remove the screws that secure the system board in place and remove the system board. 7. Take note of the location of the DIMMs and remove them from the failing system board and install them on the new system board in the same location as they were on the failing system board. See "Removing and replacing memory" on page 96. 8. Remove the heat sink and microprocessor from the failing system board and install them on the new system board. See "Removing and replacing the microprocessor." Continue at the next step after installing the heat sink and microprocessor on the new system board. 9. Install the new system board and insert the screws. 10. Reconnect all cables to the system board. 11. Replace any air baffles or ducts. 12. Go to "Closing the cover and connecting cables" on page 104. Removing and replacing the microprocessor 1. Remove the cover. See "Removing the cover" on page 92. 2. Remove any air baffles or ducts that cover the microprocessor. 3. Disconnect the heat sink fan cable from the system board. Refer to "Identifying parts on the system board" on page 95. Chapter 8. Replacing FRUs (Types 8126, 8174, 8175, and 8176) 99

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Removing
and
replacing
the
system
board
1.
Remove
the
cover.
See
“Removing
the
cover”
on
page
92.
2.
Remove
any
PCI
adapters
installed.
See
“Removing
and
replacing
a
PCI
adapter”
on
page
96.
3.
Remove
any
air
baffles
or
ducts.
4.
Carefully
take
note
of
the
location
of
all
cable
connections
on
the
system
board.
It
will
be
necessary
to
reconnect
them
properly
when
installing
a
new
system
board.
See
“Identifying
parts
on
the
system
board”
on
page
95.
5.
Disconnect
all
cables
connected
to
the
system
board.
6.
Remove
the
screws
that
secure
the
system
board
in
place
and
remove
the
system
board.
7.
Take
note
of
the
location
of
the
DIMMs
and
remove
them
from
the
failing
system
board
and
install
them
on
the
new
system
board
in
the
same
location
as
they
were
on
the
failing
system
board.
See
“Removing
and
replacing
memory”
on
page
96.
8.
Remove
the
heat
sink
and
microprocessor
from
the
failing
system
board
and
install
them
on
the
new
system
board.
See
“Removing
and
replacing
the
microprocessor.”
Continue
at
the
next
step
after
installing
the
heat
sink
and
microprocessor
on
the
new
system
board.
9.
Install
the
new
system
board
and
insert
the
screws.
10.
Reconnect
all
cables
to
the
system
board.
11.
Replace
any
air
baffles
or
ducts.
12.
Go
to
“Closing
the
cover
and
connecting
cables”
on
page
104.
Removing
and
replacing
the
microprocessor
1.
Remove
the
cover.
See
“Removing
the
cover”
on
page
92.
2.
Remove
any
air
baffles
or
ducts
that
cover
the
microprocessor.
3.
Disconnect
the
heat
sink
fan
cable
from
the
system
board.
Refer
to
“Identifying
parts
on
the
system
board”
on
page
95.
Chapter
8.
Replacing
FRUs
(Types
8126,
8174,
8175,
and
8176)
99