Lenovo IDEACENTRE 300s series Maintenance Manual page 47

Step 13. Disconnect the all cables from the connectors on motherboard.
Step 14. Remove the 5 screws that secure the motherboard to the chassis.
Step 15. Lift up the motherboard to remove it.
Step 16. 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 and microprocessor fan to the new
motherboard.
c. Connect the all cables to the new motherboard.
d. Reattach the hard disk drive, optical drive and graphic card.
Step 17. Reattach the front bezel, computer cover.
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Chapter 8 Replacing hardware
41