4  Install the:
a Heatsink assembly
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.
Power supply unit
Removing power supply unit or PSU
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
Removing and installing components
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