Lenovo J105 Hardware Maintenance Manual - Page 109

Disconnect

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Replacing the microprocessor (Types 8257, 8258, and 8259) 1. Remove the left-side cover. See "Removing the covers" on page 82. 2. Lay the computer on the right side to make the system board and microprocessor accessible. 3. Disconnect the heat sink and fan assembly cable from the system board. See "Identifying parts on the system board" on page 85. 4. Rotate handle 1 to release the heat sink clamp and then disengage the clamp from the plastic retention bracket. 5. Lift the heat sink and fan assembly off the failing system board. Lay the heat sink on its side so that the thermal grease does not touch anything. 6. To remove the microprocessor 2 from the system board, lift the small handle 1. Chapter 8. Replacing FRUs (Types 8252, 8253, 8254, 8255, 8256, 8257, 8258, and 8259) 103

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Replacing
the
microprocessor
(Types
8257,
8258,
and
8259)
1.
Remove
the
left-side
cover.
See
“Removing
the
covers”
on
page
82.
2.
Lay
the
computer
on
the
right
side
to
make
the
system
board
and
microprocessor
accessible.
3.
Disconnect
the
heat
sink
and
fan
assembly
cable
from
the
system
board.
See
“Identifying
parts
on
the
system
board”
on
page
85.
4.
Rotate
handle
±1²
to
release
the
heat
sink
clamp
and
then
disengage
the
clamp
from
the
plastic
retention
bracket.
5.
Lift
the
heat
sink
and
fan
assembly
off
the
failing
system
board.
Lay
the
heat
sink
on
its
side
so
that
the
thermal
grease
does
not
touch
anything.
6.
To
remove
the
microprocessor
±2²
from
the
system
board,
lift
the
small
handle
±1²
.
Chapter
8.
Replacing
FRUs
(Types
8252,
8253,
8254,
8255,
8256,
8257,
8258,
and
8259)
103