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Step 7.
Remove the heat-sink assembly. Refer to "Replacing the heat-sink assembly".
Step 8.
Remove the CPU. Refer to "Replacing the CPU".
Step 9.
Remove the graphic card. Refer to "Replacing the graphic card".
Step 10. Remove the Wi-Fi card. Refer to "Replacing the Wi-Fi card".
Step 11. Remove the system fan. Refer to "Replacing the system fan".
Step 12. Disconnect the all cables from the connectors on motherboard.
Step 13. Remove the 6 screws that secure the motherboard to the chassis.
Step 14. Lift up the motherboard to remove it.
Step 15. 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.
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Lenovo H505/520/535Hardware Maintenance Manual
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