Vostro 3405 Service Manual

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Removing the heat sink

Prerequisites

Follow the procedure in Before working inside your computer.
Remove the SD card.
Remove the base cover.
Disconnect the battery.

About this task

NOTE The heat sink may become hot during normal operation. Allow sufficient time for the heat sink to cool before you touch it.

NOTE For maximum cooling of the processor, do not touch the heat transfer areas on the heat sink. The oils in your skin can reduce the heat transfer capability of the thermal grease.

The following images indicate the location of the heat sink and provides a visual representation of the removal procedure.

Removing the heat sink

Steps

In reverse sequential order (4>3>2>1) loosen the four captive screws that secure the heat sink to the system board.
NOTE The number of screws varies depending on the configuration ordered.
Lift the heat sink from the system board.