d stand
5  Follow the procedure in After working inside your computer.
Heat sink
Removing heat sink 
1  Follow the procedure in Before working inside your computer.
2  Remove the:
a stand
b optical drive
c back cover
d system board shield
3  To remove heat sink:
a Remove the screw M2x2.5 that secures the heat sink to the chassis [1].
b Loosen the captive screws that secure the heat sink to the system board [2].
NOTE: Remove the screws that secure the heat sink to the system board in the order of the callouts shown 
on the heat sink [1, 2, 3, 4].
c Lift the heat sink away from the computer [3].
Installing heat sink 
1  Place the heat sink on the system board and align it with the screw holders.
2  Replace the screws to secure the heat sink to the system board.
NOTE
: Tighten the screws that secure the heat sink to the system board in the order of the callouts shown on the heat 
sink [1, 2, 3, 4].
20 Removing and installing components