Dell OptiPlex 7450 All-In-One - Installing the Heat Sink; Speaker; Removing the Speaker Module

b. Lift the heat sink away from the computer [3].
Installing the heat sink
1. Align and place the heat sink in the slot.
2. Tighten the screws to secure the heat sink to the computer.
3. Install the:
a. system board shield
b. back cover
c. stand
4. Follow the procedure in After working inside your computer.
Speaker
Removing the speaker module
1. Follow the procedure in Before working inside your computer.
2. Remove the:
a. stand
b. back cover
c. cable cover
d. speaker cover
e. system board shield
3. To release the speaker module:
a. Disconnect the speaker cable from the connector on the system board [1].
b. Unthread the speaker cables from the retention clips [2].
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Disassembly and reassembly