Dell Inspiron 24 5421 All-in-One Owners Manual - Page 77
Installing the heat sink, Steps
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Steps 1. In reverse sequential order (7>6>5>4>3>2>1), loosen the seven captive screws that secure the heat sink to the system board and the display-assembly base. 2. Lift the heat sink off the system board and display-assembly base. Installing the heat sink CAUTION: The information in this section is intended for authorized service technicians only. Prerequisites If you are replacing a component, remove the existing component before performing the installation procedure. NOTE: If either the system board or the heat sink is replaced, use the thermal pad/paste provided in the kit to ensure that thermal conductivity is achieved. About this task The following image indicates the location of the heat sink and provides a visual representation of the installation procedure. Removing and installing Field Replaceable Units (FRUs) 77