Lg K40 Screen Assembly Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          30 minutes - 1 hour

Sections

Screen Assembly
16 steps

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Introduction

Step 1

              Back Glass Removal Pt.1

Lets get started by heating up the back.
After we’ve heated the back put in your opening pick of choice; apply some alcohol and get going!
I prefer to start at the bottom and move around.

Lets get started by heating up the back.

After we’ve heated the back put in your opening pick of choice; apply some alcohol and get going!

I prefer to start at the bottom and move around.

1024

Step 2

              Back Glass Removal Pt.2

And on around we go!

And on around we go!

Step 3

              Back Glass Removal Pt.3

Finish going around.

Finish going around.

Step 4

              Adhesive Cleanup

Clean up the any remaining adhesive holding the back glass on.

Clean up the any remaining adhesive holding the back glass on.

Step 5

              Disconnecting the Fingerprint Sensor

We will start removing the back cover now.
In this area there will be clips holding the fingerprint scanner flex connector in place. All you need to do to remove in is apply pressure to the top and bottom and it should come out.
Next pull the back cover to the side and disconnect the fingerprint flex connector.

We will start removing the back cover now.

In this area there will be clips holding the fingerprint scanner flex connector in place. All you need to do to remove in is apply pressure to the top and bottom and it should come out.

Next pull the back cover to the side and disconnect the fingerprint flex connector.

Step 6

              Midframe Removal Pt.1

Remove the 15 Phillips screws.
Begin to remove the midframe. Luckily for us there are plenty of clips holding it down too, because the screws weren’t enough I guess :)

Remove the 15 Phillips screws.

Begin to remove the midframe. Luckily for us there are plenty of clips holding it down too, because the screws weren’t enough I guess :)

Step 7

              Midframe Removal Pt.2

Finish prying around to remove the midframe. It will feel like you have to pry quite a bit. That is fine. Find those clips and pry away from the clip and that will save you some time.

Finish prying around to remove the midframe. It will feel like you have to pry quite a bit. That is fine. Find those clips and pry away from the clip and that will save you some time.

Step 8

              Disconnecting the Flex Connectors Pt.1

On to the flex connectors we go!
We will disconnect the battery first.

On to the flex connectors we go!

We will disconnect the battery first.

Step 9

              Disconnecting the Flex Connectors Pt.2

Then we will disconnect the display.

Then we will disconnect the display.

Step 10

              Remove Sim Tray

Remove the sim tray. You can use a sim ejector, needle, paper clip, or whatever your preferred ejector tool is.

Remove the sim tray. You can use a sim ejector, needle, paper clip, or whatever your preferred ejector tool is.

Step 11

              Motherboard Removal

If you skip ahead to this step, like I would, make sure you remove the sim tray before this step.
Now we will get to remove the motherboard.
Luckily it too is held in with clips, YAY!
Move around the motherboard releasing it from the clips.
Once done just pull the motherboard up and away from the charge port and it comes right out!

If you skip ahead to this step, like I would, make sure you remove the sim tray before this step.

Now we will get to remove the motherboard.

Luckily it too is held in with clips, YAY!

Move around the motherboard releasing it from the clips.

Once done just pull the motherboard up and away from the charge port and it comes right out!

Step 12

              A Brief Look at the Motherboard

Here is the motherboard. One large board with no daughterboards.

Here is the motherboard. One large board with no daughterboards.

Step 13

              Battery Removal

Next we will heat up the front of the phone to loosen the battery adhesive.
Apply small amounts of alcohol around the sides of the battery to help with the removal.

Next we will heat up the front of the phone to loosen the battery adhesive.

Apply small amounts of alcohol around the sides of the battery to help with the removal.

Step 14

              Ear Speaker Removal

Once again we will warm the front of the phone to help loosen the adhesive under the ear speaker.
I recommend not using alcohol as it can damage the ear speaker if not done correctly.

Once again we will warm the front of the phone to help loosen the adhesive under the ear speaker.

I recommend not using alcohol as it can damage the ear speaker if not done correctly.

Step 15

              Vibrate Motor Removal

Next we will remove the vibrate motor.
It should still be warm enough from the heating in the previous step, but if not you can heat it up again, or loosen with alcohol to help with the adhesive.

Next we will remove the vibrate motor.

It should still be warm enough from the heating in the previous step, but if not you can heat it up again, or loosen with alcohol to help with the adhesive.

Step 16

              The End

There we are! Device disassembled for screen assembly replacement!

There we are! Device disassembled for screen assembly replacement!

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

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Author

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                    Zach B

Member since: 10/28/2022

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Introduction