Introduction

The chassis frame is a plastic frame which is used to secure components in your laptop.

In this guide, you will learn how to disassemble your Dell Latitude 5490 laptop's chassis frame.

Disassembling the chassis frame is required to access and specific components within your laptop.

What you need

Step 1 Removing Back Panel and Disconnecting Battery

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Power off the laptop before beginning the disassembly process.
Close the device and flip the laptop over so the backplate is facing up.

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Step 2

Using a Phillips #0 Screwdriver, loosen all eight captive screws in the backplate.
You do not need to fully remove the screws. Instead, unscrew them until you can easily jostle the screws.

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Step 3

Using the spudger, pry the backplate from the laptop starting from external chassis (the back side of the laptop).
Continue prying in a clockwise direction around the backplate until it is able to be removed with just your hands.
Remove the backplate and put it aside for reassembly.

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Step 4

Using your finger, remove the battery connector using the handle found on top.
You do not need to remove the connector completely from the laptop. Doing so may result in damage to your computer. Instead, pull the handle so the connector is suspended above the pins.

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Step 5

Hold down the power button for 15 seconds to discharge the remaining electricity within the laptop.

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Step 6 Battery

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Carefully unroute the cable connecting the battery to the laptop.

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Step 7

Remove the single marked 4 mm screw from the righthand side of the battery using a Phillips #0 screwdriver.

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Step 8

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Gently lift the battery out of the laptop.

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Step 9 SSD (Solid State Drive)

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Remove the single 4 mm screw connecting the back of the SSD to the laptop using a Phillips #0 screwdriver.
When the screw is removed, the SSD will be angled with an incline to one side.

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Step 10

Carefully slide the SSD straight out from the rear side, from the end where the screw was previously secured.
The SSD should come out easily with no tension.

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Step 11 WWAN (Cellular Card)

Dell Latitude 5490 Chassis Frame Replacement, WWAN (Cellular Card): step 11, image 1 of 1

Remove the 4 mm screw holding the bracket above the WWAN card with a Phillips #0 screwdriver.
Be careful with the antenna connectors located under the bracket. They are fragile. If damaged, you will not be able to access mobile data.

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Step 12

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Carefully remove both antenna connectors. Ensure that you pull the antenna connectors straight up from the socket.
Using angled tweezers, hook one end of the tweezer under the connector. Set the other side at the end of the connector on the WWAN card. Keeping the tweezers flat, lightly squeeze.
These connectors are extremely fragile; ensure that they are aligned properly.
For reassembly, ensure that the antenna connectors are aligned above the sockets and press down gently. There should be a slight click. There should not be much resistance.

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Step 13

Carefully slide the WWAN card out from the rear side, from the end where the antennas and bracket were.
The WWAN card should come out easily with no tension.

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Step 14 WLAN (WiFi Card)

Dell Latitude 5490 Chassis Frame Replacement, WLAN (WiFi Card): step 14, image 1 of 1

Remove the 4 mm screw holding the bracket above the WLAN card with a Phillips #0 screwdriver.
Be careful with the antenna connectors located under the bracket. They are fragile. If damaged, you will not be able to access Wi-Fi.

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Step 15

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Carefully remove both antenna connectors. Ensure that you pull the antenna connectors straight up from the socket.
Using angled tweezers, hook one end of the tweezer under the connector. Set the other side at the end of the connector on the WLAN card. Keeping the tweezers flat, lightly squeeze.
These connectors are extremely fragile; ensure that they are aligned properly.
For reassembly, ensure that the antenna connectors are aligned above the sockets and press down gently. There should be a slight click. There should not be tension or resistance while doing so.

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Step 16

Carefully slide the WLAN card out from the rear side, from the end where the antennas and bracket were.
The WLAN card should come out easily with no tension.

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Step 17 Chassis Frame

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Using the angled tweezers, lift the small latches on the ribbon cables that are routed through the chassis. Gently remove them.
These cables and their connectors are extremely fragile; exercise caution when removing/inserting them.

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