This 3D experience gives you the step by step process of replacing the Heatsink and a Latitude 3400. The procedure will also include removing the Base Cover, Battery Cable, Option Heatsink and reinstalling them.
Removal
Base Cover
Identify the base cover highlighted in blue.
Loosen the captive screws that secure the base cover.
Pry the base cover to release it from the system - pry from the recess areas near the hinges.
Lift the right side of the base cover and remove it off the palmrest and keyboard assembly.
Battery Cable
Identify the battery cable highlighted in blue.
Disconnect the battery cable from the system board.
Press and hold the power button for 10 seconds to ground the system and remove residual static electricity.
Option Heatsink
Install
Option Heatsink
Battery Cable
Identify the battery cable location highlighted in blue.
Connect the battery cable to the connector on the system board.
Base Cover
Identify the base cover location highlighted in blue.
Place the base cover on the system, installing the left side first over the VGA port. Press until it clicks into place.
Tighten the captive screws that secure the base cover to the palmrest and keyboard assembly.