Lenovo IdeaCentre C240 Hardware Maintenance Manual page 46

Step 8. Remove all the cables connected to the motherboard.
Step 9. Remove the 7 screws that secure the motherboard to the rear cover and lift it up to remove it.
Step 10. To install the new motherboard:
a. Insert the notched end of the Wi-Fi card into the card port on the new motherboard and
secure it with the screw.
b. Connect the antenna cable(s) to the Wi-Fi card.
c. Line up the holes on the new motherboard with the mounting holes on the rear cover and
secure the new motherboard with the 7 screws.
d. Attach the heat-sink, Wi-Fi card, memory modules to the new motherboard.
e. Connect all the cables to the new motherboard.
Step 11. Reattach the rear cover and secure it with the screws.
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Lenovo C240/245/255 All-In-One PC Hardware Maintenance Manual
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