Dell Inspiron 5421, Service Manual

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NOTE: The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you
touch it.
2. Enter Service Mode .
3. Remove the SIM card .
4. Remove the microSD card .
5. Remove the base cover .
About this task
The following images indicate the location of the heat sink and fan assembly for a system with UMA configuration and provide a
visual representation of the removal procedure.
Steps
1. In reverse sequential order (as indicated on the heat sink), remove the four (M2x3) and two (M2x5) screws that secure the
heat sink and fan assembly to the system board.
2. Lift the heat sink and fan assembly off the system board.
Installing the heat sink and fan assembly - UMA configuration
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
CAUTION: Incorrect alignment of the heat sink can damage the system board and processor.
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 fan assembly for a system with UMA configuration and provides
a visual representation of the installation procedure.
Removing and installing components 43