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Featured Guide

Difficulty

Moderate

Steps

24

Time Required

                          1 - 2 hours

Sections

4

  • Samsung Galaxy M31 Back Cover Removal
  • 6 steps
  • Samsung Galaxy M31 Motherboard Cover
  • 2 steps
  • Samsung Galaxy M31 Battery Disconnect
  • 1 step
  • AMOLED Screen & Digitizer
  • 15 steps

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Introduction

If the frame is deformed, it’s important to replace it to make sure the new screen will mount correctly and won’t suffer damage from uneven pressure.

Before disassembling your phone, discharge the battery below 25%. The battery can catch fire and/or explode if accidentally punctured, but the chances of that happening are much lower if discharged.

Note: This guide instructs you to replace only the screen while leaving the original frame and motherboard in place. However, some replacement screens for this phone come pre-installed in a new frame (a.k.a. chassis), which requires a very different procedure. Make sure you have the correct part before starting this guide.

You’ll need replacement adhesive to reattach components when reassembling the device.

What you need

Step 1

              Remove SIM Card Tray
  • Insert a SIM card eject tool, a SIM eject bit or a straightened paper clip into the hole on the SIM tray located at the left side of the phone.
  • Press firmly to eject the tray.

Insert a SIM card eject tool, a SIM eject bit or a straightened paper clip into the hole on the SIM tray located at the left side of the phone.

Press firmly to eject the tray.

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Step 2

  • Insert an opening pick between the phone assembly and the back cover at the bottom edge of the phone.
  • Slide the opening pick around the bottom right corner to release the clips holding the back cover in place.

Insert an opening pick between the phone assembly and the back cover at the bottom edge of the phone.

Slide the opening pick around the bottom right corner to release the clips holding the back cover in place.

Step 3

  • Insert a second opening pick between back cover and the phone assembly at the bottom edge of the phone.
  • Slide the opening pick around the bottom left corner to release the plastic clips holding the back cover in place.

Insert a second opening pick between back cover and the phone assembly at the bottom edge of the phone.

Slide the opening pick around the bottom left corner to release the plastic clips holding the back cover in place.

Step 4

  • Slide the opening pick along the left side of the phone to release the plastic clips on the left side of the back cover.

Slide the opening pick along the left side of the phone to release the plastic clips on the left side of the back cover.

Step 5

  • Slide the opening pick along the right side of the phone to release the plastic clips on the right side of the back cover.

Slide the opening pick along the right side of the phone to release the plastic clips on the right side of the back cover.

Step 6

              Remove Back Cover
  • The flex cable of the fingerprint sensor is very short and the sensor is likely to disconnect itself during the following removal procedure. Avoid damaging the cable by removing the back cover too quickly.
  • Carefully lift the phone assembly out of the back cover.
  • During reassembly, this is a good point to power on your phone and test all functions before reinstalling the back cover. Be sure to power your phone back down completely before you continue working.

The flex cable of the fingerprint sensor is very short and the sensor is likely to disconnect itself during the following removal procedure. Avoid damaging the cable by removing the back cover too quickly.

Carefully lift the phone assembly out of the back cover.

During reassembly, this is a good point to power on your phone and test all functions before reinstalling the back cover. Be sure to power your phone back down completely before you continue working.

Step 7

              Unfasten Motherboard Cover
  • Remove the seven Phillips #00 screws (3.9 mm length).

Remove the seven Phillips #00 screws (3.9 mm length).

Step 8

              Remove Motherboard Cover
  • Insert the tip of an opening pick underneath the top edge of the motherboard cover.
  • Use the opening pick to pry up the motherboard cover.
  • Remove the motherboard cover.

Insert the tip of an opening pick underneath the top edge of the motherboard cover.

Use the opening pick to pry up the motherboard cover.

Remove the motherboard cover.

Step 9

              Battery Disconnect
  • Use the flat end of a spudger to pry up and disconnect the battery flex cable.

Use the flat end of a spudger to pry up and disconnect the battery flex cable.

Step 10

              Unfasten Loudspeaker
  • Remove the eight Phillips #00 screws (3.9 mm length).

Remove the eight Phillips #00 screws (3.9 mm length).

Step 11

              Remove Loudspeaker
  • Slide an opening pick underneath the top edge of the loudspeaker where the interconnect flex cable is located.
  • Use the opening pick to pry up the loudspeaker.

Slide an opening pick underneath the top edge of the loudspeaker where the interconnect flex cable is located.

Use the opening pick to pry up the loudspeaker.

Step 12

  • Remove the loudspeaker.

Remove the loudspeaker.

Step 13

              Disconnect Display Cable Extension
  • Use the flat end of a spudger to pry up and disconnect the extension of the display flex cable.
  • Remove the extension of the display flex cable.

Use the flat end of a spudger to pry up and disconnect the extension of the display flex cable.

Remove the extension of the display flex cable.

Step 14

  • Use the pointed end of a spudger to carefully pry up the display flex connector from the midframe.
  • The connector of the display flex cable is held in place by mild adhesive. In case it doesn’t come off easily you can apply a heated iOpener to the bottom end of the screen to loosen the adhesive underneath the connector.

Use the pointed end of a spudger to carefully pry up the display flex connector from the midframe.

The connector of the display flex cable is held in place by mild adhesive. In case it doesn’t come off easily you can apply a heated iOpener to the bottom end of the screen to loosen the adhesive underneath the connector.

Step 15

              Soften Display Adhesive
  • Apply a heated iOpener to the screen to loosen the adhesive underneath. Apply the iOpener for at least two minutes.

Apply a heated iOpener to the screen to loosen the adhesive underneath. Apply the iOpener for at least two minutes.

Step 16

              Separate the Bottom Edge Adhesive
  • Once the screen is warm to the touch, apply a suction handle to the bottom edge of the phone.
  • If the phone’s screen is cracked, the suction handle may not stick. Try lifting it with strong tape, or superglue the suction handle in place and allow it to cure so you can proceed.
  • Lift the screen with the suction handle to create a small gap between the screen and the frame.
  • Insert the tip of an opening pick in the gap between the midframe and the screen.
  • Slide the opening pick to the bottom right corner to cut the adhesive. Leave it in its place to prevent the adhesive from resealing.

Once the screen is warm to the touch, apply a suction handle to the bottom edge of the phone.

If the phone’s screen is cracked, the suction handle may not stick. Try lifting it with strong tape, or superglue the suction handle in place and allow it to cure so you can proceed.

Lift the screen with the suction handle to create a small gap between the screen and the frame.

Insert the tip of an opening pick in the gap between the midframe and the screen.

Slide the opening pick to the bottom right corner to cut the adhesive. Leave it in its place to prevent the adhesive from resealing.

Step 17

  • Insert a second opening pick and slide it to the bottom left corner of the screen to cut the adhesive.
  • Leave the picks in their place to prevent the adhesive from resealing.

Insert a second opening pick and slide it to the bottom left corner of the screen to cut the adhesive.

Leave the picks in their place to prevent the adhesive from resealing.

Step 18

              Separate the Left Edge Adhesive
  • If cutting becomes too difficult, reheat and reapply the iOpener.
  • Insert a third opening pick under the bottom left corner of the phone.
  • Slide the opening pick up to the top left corner to cut the adhesive. Leave it there to prevent the adhesive from resealing.

If cutting becomes too difficult, reheat and reapply the iOpener.

Insert a third opening pick under the bottom left corner of the phone.

Slide the opening pick up to the top left corner to cut the adhesive. Leave it there to prevent the adhesive from resealing.

Step 19

              Separate the Top Edge Adhesive
  • Insert a fourth opening pick at the top left corner.
  • When nearing the front facing camera, only work with the tip of the opening pick to avoid damaging or smearing the camera. The speaker grill which is located above the front facing camera falls off easily. Avoid loosing it.
  • Slide the opening pick along the top edge of the phone to cut the adhesive. Leave the pick in the top right corner of the screen to prevent the adhesive from resealing.

Insert a fourth opening pick at the top left corner.

When nearing the front facing camera, only work with the tip of the opening pick to avoid damaging or smearing the camera. The speaker grill which is located above the front facing camera falls off easily. Avoid loosing it.

Slide the opening pick along the top edge of the phone to cut the adhesive. Leave the pick in the top right corner of the screen to prevent the adhesive from resealing.

Step 20

              Separate the Right Edge Adhesive
  • Insert a fifth opening pick and slide it along the right edge of the phone to cut the remaining adhesive.
  • Try not to remove the display all the way yet, the display is still held onto the midframe by adhesive beneath its center.
  • Leave the opening picks in their place to prevent the adhesive from resealing.

Insert a fifth opening pick and slide it along the right edge of the phone to cut the remaining adhesive.

Try not to remove the display all the way yet, the display is still held onto the midframe by adhesive beneath its center.

Leave the opening picks in their place to prevent the adhesive from resealing.

Step 21

              Soften Display Adhesive
  • Apply a heated iOpener to the screen to loosen the adhesive underneath its center. Apply the iOpener for at least two minutes.

Apply a heated iOpener to the screen to loosen the adhesive underneath its center. Apply the iOpener for at least two minutes.

Step 22

  • Slide a plastic card underneath the right edge of the screen.
  • Use the plastic card to cut the adhesive beneath the center of the screen by sliding it to the bottom edge of the phone.
  • Try not to remove the display all the way yet, the display cable is still threaded through the frame and possible adhered on the inner side of the midframe.

Slide a plastic card underneath the right edge of the screen.

Use the plastic card to cut the adhesive beneath the center of the screen by sliding it to the bottom edge of the phone.

Try not to remove the display all the way yet, the display cable is still threaded through the frame and possible adhered on the inner side of the midframe.

Step 23

              Thread Display Cable through Midframe
  • Thread the display flex cable through the gap in the midframe and remove the display.

Thread the display flex cable through the gap in the midframe and remove the display.

Step 24

              Remove Display
  • Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before installing.

Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before installing.

If possible, turn on your device and test your repair before installing new adhesive and resealing.

To reassemble your device, follow these instructions in reverse order. Apply new adhesive where necessary after cleaning the relevant areas with isopropyl alcohol (>90%).

The best way to secure the new screen is to apply a sheet of custom-cut double-sided tape to the back of the screen.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

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                                                                                      11 other people completed this guide.

Author

                    Dominik Schnabelrauch

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Sai Srinivas - Jun 25, 2022

Reply

My m30s mobile auto restart

And not switch on now pl give solution saisrinivas.chemicalweekly@gmail.com

البرنس - Jun 25, 2022

Reply

هذا رائع وجميل

Jane Gorrie - Sep 2, 2022

Reply

Very good guide. Thank you very much.

I found I needed to use a nail file to help get the back off at the start, done very carefully.

To heat the phone to make the glue soft, I sat it on a hot water bottle for a few minutes, that worked beautifully.

Adil El bissari - Oct 30, 2022

Reply

Thank you very mach