Lenovo 90BX E50–00 Series Hardware Maintenance Manual page 42

Step 11. Remove the 5 screws that secure the motherboard to the chassis.
Step 12. Lift up the motherboard to remove it.
Step 13. Install the new motherboard:
a. Line up the holes on the new motherboard with mounting holes on the chassis and secure
it with screws.
b. Reattach the memory module, Wi-Fi card, heat-sink assembly to the new motherboard.
c. Connect the all cables to the new motherboard.
d. Reattach the hard disk drive, optical drive, graphic card and the TV-Tuner card.
Step 14. Reattach the computer cover.
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Lenovo E50–00 SeriesHardware Maintenance Manual