Dell Inspiron 5758 Heatsink And Fan Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          45 minutes

Sections

Battery
2 steps
DC Jack
16 steps
Heatsink and Fan
4 steps

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Introduction

Your fan and heatsink assembly transfers heat from your GPU and CPU to the environment. If the fan is not rotating or the heat-pipe is damaged, the GPU and CPU will get too hot and they will throttle their frequency to reduce temperature. The laptop’s performance will then slow down during heavy loads.

Before using this guide, verify that the ventilation on the bottom of the laptop is not obstructed or dirty. This will prevent the fan and heatsink from operating efficiently.

Electronics are sensitive to ESD. You must use ESD-safe tools and a mat. Here is a link for using an anti-static mat and wristband.

The heatsink will require new thermal paste. Here is a link detailing how to remove the old paste and how to apply the new paste.

The laptop must be unplugged and the battery removed before opening the laptop. Step 1 and 2 cover removing the battery.

What you need

Step 1

              Battery

Flip the laptop with the serial number facing up. You should be able to see the battery release switch.

Flip the laptop with the serial number facing up. You should be able to see the battery release switch.

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Step 2

Slide the battery release switch towards the unlock icon.
You should hear a click.
Lift and pull the ejected battery to remove it.

Slide the battery release switch towards the unlock icon.

You should hear a click.

Lift and pull the ejected battery to remove it.

Step 3

              DC Jack

Remove the one 3mm optical drive screw.
Remove the two 8 mm screws.
Pry up and remove the access door.

Remove the one 3mm optical drive screw.

Remove the two 8 mm screws.

Pry up and remove the access door.

Step 4

Remove the one 3 mm screw.
Remove the bracket.

Remove the one 3 mm screw.

Remove the bracket.

Step 5

Unplug the antenna cables.
Remove the Wireless Card.

Unplug the antenna cables.

Remove the Wireless Card.

Step 6

Unplug the hard drive cable.
Use a plastic opening tool or your fingernail to pop the tab of the cable connector. Then you will be able to disconnect the cable.
Remove the four 8 mm screws.
Remove the hard drive.

Unplug the hard drive cable.

Use a plastic opening tool or your fingernail to pop the tab of the cable connector. Then you will be able to disconnect the cable.

Remove the four 8 mm screws.

Remove the hard drive.

Step 7

Remove the two 3 mm screws under the battery.
Remove the three 2 mm wafer screws under the optical drive.
Remove the ten 8 mm base screws.

Remove the two 3 mm screws under the battery.

Remove the three 2 mm wafer screws under the optical drive.

Remove the ten 8 mm base screws.

Step 8

Unplug the speaker cable by sliding to the right.

Unplug the speaker cable by sliding to the right.

Step 9

Press in the tabs to loosen the keyboard.
Carefully lift the keyboard up and turn it over.

Press in the tabs to loosen the keyboard.

Carefully lift the keyboard up and turn it over.

Step 10

Unplug the keyboard cable & remove the keyboard.

Unplug the keyboard cable & remove the keyboard.

Step 11

Slide the DVD optical drive over & remove it from the laptop.

Slide the DVD optical drive over & remove it from the laptop.

Step 12

Remove the four 5 mm screws.
Unplug the optical drive interposer cable.

Remove the four 5 mm screws.

Unplug the optical drive interposer cable.

Step 13

Unplug the power button cable.
Unplug the touchpad cable.

Unplug the power button cable.

Unplug the touchpad cable.

Step 14

Carefully pry off & loosen the bottom base.

Carefully pry off & loosen the bottom base.

Step 15

Remove the bottom base.

Remove the bottom base.

Step 16

Remove the one 5mm screw.
Lift the circuit board & turn it over.
Unplug the cable.
Remove the audio/USB circuit board.

Remove the one 5mm screw.

Lift the circuit board & turn it over.

Unplug the cable.

Remove the audio/USB circuit board.

Step 17

Loosen the audio / USB cable.
Remove the one 3mm motherboard screw.
Lift the motherboard & carefully move it out of the way.

Loosen the audio / USB cable.

Remove the one 3mm motherboard screw.

Lift the motherboard & carefully move it out of the way.

Step 18

Unplug the DC jack cable.
Remove the one 3mm screw.
Remove the DC Jack.

Unplug the DC jack cable.

Remove the one 3mm screw.

Remove the DC Jack.

Step 19

              Heatsink and Fan

After removing the bottom base, you can access the heatsink and fan, which is attached to the motherboard.

After removing the bottom base, you can access the heatsink and fan, which is attached to the motherboard.

Step 20

Unplug the cable that connects the heatsink and fan to the motherboard.

Unplug the cable that connects the heatsink and fan to the motherboard.

Step 21

Loosen the three 5mm screws that connect the heatsink and fan to the motherboard.
The screws stay attached to the heatsink and fan. You cannot pull them out, only loosen them.

Loosen the three 5mm screws that connect the heatsink and fan to the motherboard.

The screws stay attached to the heatsink and fan. You cannot pull them out, only loosen them.

Step 22

Remove the heatsink and fan from the motherboard. You can now clean or replace it as you see fit.

Remove the heatsink and fan from the motherboard. You can now clean or replace it as you see fit.

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

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                    Blase Martin

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                       University of North Texas, Team S3-G4, Raign Fall 2018                        

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Introduction

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