Introduction
Use this guide to replace a cracked or broken screen on your Samsung Galaxy A40.
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
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Insert a SIM card eject tool, a SIM eject bit or a straightened paper clip into the hole on the SIM tray located on the left side of the phone.
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Press your SIM card eject tool firmly into the hole in order to eject the SIM card tray.
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Remove the SIM card tray.
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Apply a heated iOpener to the back cover to loosen the adhesive underneath. Apply the iOpener for at least two minutes.
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Secure a suction handle to the right edge of the back cover, as close to the edge as possible.
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Lift the back cover with the suction handle to create a small gap between the back cover and the frame.
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Insert an opening pick into the gap.
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Slide the opening pick to the bottom right corner and leave it in place to prevent the adhesive from resealing.
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Insert a second opening pick at the bottom right corner.
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Slide the opening pick along the right edge of your phone to cut the adhesive beneath the back cover.
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Leave the opening pick in the top right corner.
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Insert a third opening pick at the top right corner of your phone.
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Slide the opening pick along the top edge of your phone to cut the adhesive.
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Leave the opening pick in the top left corner to prevent the adhesive from resealing.
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Insert an opening pick between the left edge of the phone assembly and the midframe.
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Slide the opening pick along the left edge of the phone to release the plastic clips holding the midframe in place.
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Slide the opening pick around the bottom right corner and release the plastic clips at the bottom edge of the phone assembly.
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Use the flat end of a spudger to pry up and disconnect the battery cable.
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Use a spudger to disconnect the display flex cable at the bottom right corner of your phone.
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Apply a heated iOpener to the screen to loosen the adhesive underneath. Apply the iOpener for at least two minutes.
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Once the screen is warm to the touch, apply a suction handle to the bottom edge of the phone.
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Lift the screen with the suction handle to create a small gap between the screen and the frame.
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Insert the tip of an opening pick in the gap between the midframe and the screen.
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Slide the opening pick to the bottom left corner to cut the adhesive. Leave it in its place to prevent the adhesive from resealing.
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Insert a second opening pick and slide it to the bottom right corner of the screen to cut the adhesive.
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Leave the picks in their place to prevent the adhesive from resealing.
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Apply a heated iOpener to the screen to loosen the adhesive underneath its center. Apply the iOpener for at least two minutes.
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Slide a plastic card underneath the bottom right corner of the screen.
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Use the plastic card to cut the adhesive beneath the center of the screen by sliding it to the top right corner of the phone.
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Thread the display flex cable through the gap in the midframe and remove the screen.
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If possible, turn on your device and test your repair before installing new adhesive and resealing.
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.
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.
If possible, turn on your device and test your repair before installing new adhesive and resealing.
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.
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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One Comment
ach du gute Güte, ich repariere gerade ein Samsung A40 (Displaytausch).. ohne Worte - jetzt weiß ich, wieso Apple iPhones etwas teurer sind!!!!
