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2. To get access to the system board, remove the following parts if any:
a. "Wi-Fi card" on page 71.
b. "M.2 solid-state drive" on page 72.
c. "Computer cover and rear I/O bracket" on page 73.
d. "Coin-cell battery" on page 75.
e. "System fan" on page 76.
f.
"Internal speaker" on page 77.
g. "Heat sink" on page 78.
3. Record the cable routing and cable connections, and then disconnect all cables from the system board.
See "System board" on page 58.
4. Remove the two screws that secure the system board, and then carefully lift the system board out of the
chassis.
Note: Carefully handle the system board by its edges.
5. Install the new system board into the chassis by aligning the two screw holes in the new system board
with the corresponding mounting studs on the chassis. Then, install the two screws to secure the new
system board.
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ThinkCentre M75nHardware Maintenance Manual
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