Dell Inspiron 17 5749 Heat Sink Assembly Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          1 hour

Sections

Battery
2 steps
Back Cover
1 step
Optical Drive
2 steps
Hard Drive
1 step
Wireless Card
1 step
Keyboard
2 steps
Palm Rest
2 steps
Optical-Drive Connector Board
1 step
Battery-Connector Board
1 step
System Board
3 steps
Heat-sink Assembly
1 step

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What you need

Step 1

              Battery

Turn off power to the laptop.
Unplug the charging cable from the laptop.
Failure to unplug the charging cable could result in damaging the computer or seriously injuring yourself.
Wear the anti-static wrist strap or work in an uncarpeted area to prevent static shocks. Shocks may damage the components.

Turn off power to the laptop.

Unplug the charging cable from the laptop.

Failure to unplug the charging cable could result in damaging the computer or seriously injuring yourself.

Wear the anti-static wrist strap or work in an uncarpeted area to prevent static shocks. Shocks may damage the components.

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Step 2

First carefully turn the laptop over so you can access the battery.
Switch each of the battery latches to the “unlocked” position.
Pull battery upwards by the tab to remove from the laptop.

First carefully turn the laptop over so you can access the battery.

Switch each of the battery latches to the “unlocked” position.

Pull battery upwards by the tab to remove from the laptop.

Step 3

              Back Cover

Remove the two 5.5mm screws that secure the base cover to the computer’s base.
Using the plastic opening tool, carefully pry open the base cover starting from the center.
Lift the base cover upwards to remove and set it aside.

Remove the two 5.5mm screws that secure the base cover to the computer’s base.

Using the plastic opening tool, carefully pry open the base cover starting from the center.

Lift the base cover upwards to remove and set it aside.

Step 4

              Optical Drive

Remove the 5.5mm screw that secures the optical-drive assembly to the computer base
Using your fingertips, slide the optical-drive assembly out of the optical drive bay.

Remove the 5.5mm screw that secures the optical-drive assembly to the computer base

Using your fingertips, slide the optical-drive assembly out of the optical drive bay.

Step 5

This step is only needed if replacing the optical drive.
Remove the 2.5mm screw that secures the optical-drive bracket to the optical drive assembly.
Remove the optical-drive bracket from the optical-drive assembly.
Carefully pull the optical-drive bezel and remove it from the optical drive.

This step is only needed if replacing the optical drive.

Remove the 2.5mm screw that secures the optical-drive bracket to the optical drive assembly.

Remove the optical-drive bracket from the optical-drive assembly.

Carefully pull the optical-drive bezel and remove it from the optical drive.

Step 6

              Hard Drive

Remove the 2.5mm screw that secures the hard-drive assembly to the computer base.
Using the pull tab, slide the hard-drive assembly to disconnect it from the system board.
Lift the hard-drive assembly off the computer base

Remove the 2.5mm screw that secures the hard-drive assembly to the computer base.

Using the pull tab, slide the hard-drive assembly to disconnect it from the system board.

Lift the hard-drive assembly off the computer base

Step 7

              Wireless Card

Disconnect the antenna cables from the wireless card.
Push the securing tab to release the wireless card.
Slide the wireless card out of the wireless-card slot.

Disconnect the antenna cables from the wireless card.

Push the securing tab to release the wireless card.

Slide the wireless card out of the wireless-card slot.

Step 8

              Keyboard

Turn the computer over and open the display as far as possible
Using a plastic opening tool, release the tabs that secure the keyboard to the palm-rest assembly.
Before turning over the keyboard, be careful not to pull the keyboard too far away as it could damage the connected ribbon cables.

Turn the computer over and open the display as far as possible

Using a plastic opening tool, release the tabs that secure the keyboard to the palm-rest assembly.

Before turning over the keyboard, be careful not to pull the keyboard too far away as it could damage the connected ribbon cables.

Step 9

Carefully turn the keyboard over and place it on the palm rest assembly.
Lift the latches and disconnect the keyboard cable and keyboard back-light cable from the system board.
Lift the keyboard along with the cables, off the palm-rest assembly and set it aside.

Carefully turn the keyboard over and place it on the palm rest assembly.

Lift the latches and disconnect the keyboard cable and keyboard back-light cable from the system board.

Lift the keyboard along with the cables, off the palm-rest assembly and set it aside.

Step 10

              Palm Rest

Remove the (5) 5.5mm screws that secure the palm rest to the system board.
Close the display and turn the computer over.
Remove the (10) 5.5mm screws that secure the palm rest to the computer base.

Remove the (5) 5.5mm screws that secure the palm rest to the system board.

Close the display and turn the computer over.

Remove the (10) 5.5mm screws that secure the palm rest to the computer base.

Step 11

Turn the computer over and open the display as far as possible.
Lift the connector latches and disconnect the power-button board cable and the touch-pad cable from the system board.
Using a plastic scribe, gently lift and release the tabs on the palm rest around the computer base including the backside.
Lift the palm rest away from the display assembly.

Turn the computer over and open the display as far as possible.

Lift the connector latches and disconnect the power-button board cable and the touch-pad cable from the system board.

Using a plastic scribe, gently lift and release the tabs on the palm rest around the computer base including the backside.

Lift the palm rest away from the display assembly.

Step 12

              Optical-Drive Connector Board

Remove the 2.5mm screw that secures the optical-drive connector board to the computer base.
Move wireless card wires covering the board away from the board.
Slide the optical-drive connector board away from the computer base.
Lift the optical-drive connector board away from the computer base.

Remove the 2.5mm screw that secures the optical-drive connector board to the computer base.

Move wireless card wires covering the board away from the board.

Slide the optical-drive connector board away from the computer base.

Lift the optical-drive connector board away from the computer base.

Step 13

              Battery-Connector Board

Remove the 5.5mm screws that secure the battery-connector board to the computer base.
Carefully lift the battery-connector board to disconnect it from the system board.

Remove the 5.5mm screws that secure the battery-connector board to the computer base.

Carefully lift the battery-connector board to disconnect it from the system board.

Step 14

              System Board

Close the display and turn the computer over.
Remove the antenna cables from the routing guides on the computer base.
Slide the antenna cables through the slot on the computer base.

Remove the antenna cables from the routing guides on the computer base.

Slide the antenna cables through the slot on the computer base.

Step 15

Turn the computer over and open the display as far as possible.
Peel off the tape that secures the display cable to the system-board assembly.
Lift the connector latch and disconnect the display cable from the system board.
Lift the connector latch and disconnect the I/O board cable from the system board.

Peel off the tape that secures the display cable to the system-board assembly.

Lift the connector latch and disconnect the display cable from the system board.

Lift the connector latch and disconnect the I/O board cable from the system board.

Step 16

Disconnect the speaker cable from the system board.
Disconnect the power-adapter port cable from the system board.
Remove the 5.5mm screws that secure the system-board assembly to the computer base.
Lift the system-board assembly off the computer base.

Disconnect the speaker cable from the system board.

Disconnect the power-adapter port cable from the system board.

Remove the 5.5mm screws that secure the system-board assembly to the computer base.

Lift the system-board assembly off the computer base.

Step 17

              Heat-sink Assembly

Turn the system-board assembly over and place it on a flat and clean surface.
In sequential order (indicated on the heat sink), loosen the (3) captive 5.5mm screws that secure the heat-sink assembly to the system board.
Disconnect the fan cable from the system board.
Lift the heat-sink assembly off the system board.

Turn the system-board assembly over and place it on a flat and clean surface.

In sequential order (indicated on the heat sink), loosen the (3) captive 5.5mm screws that secure the heat-sink assembly to the system board.

Disconnect the fan cable from the system board.

Lift the heat-sink assembly off the system board.

To reassemble your device, follow these instructions in reverse order.

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                    Christopher Tran

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