Lenovo C240 All-in-One - Manual (Page 46)

Step 8. Remove all the cables connected to the motherboard. 1 2 3 4 5 6
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Step 9. Remove the 7 screws that secure the motherboard to the rear cover and lift it up to remove it. 1
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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.
40 Lenovo C240/245/255 All-In-One PC Hardware Maintenance Manual