3 Replace the Heat sink fan.
4 Install the:
a Heat sink duct
b Hard drive and optical drive module
c HDD assembly
d Front bezel
e Side cover
5 Follow the procedure in After working inside your computer.
Intrusion switch
Removing intrusion switch
1 Follow the procedure in Before working inside your computer.
2 Remove the:
a Side cover
b Front bezel
c HDD assembly
d Hard drive and optical drive module
e Heat sink duct
f Heat sink fan
3 To remove the intrusion switch:
a Disconnect the intrusion switch cable from the connector on the system board [1].
b Slide the intrusion switch and lift it away from the system chassis [2].
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Disassembly and reassembly