Samsung Galaxy Note8 Motherboard prereq

Step 1

Switch off your phone.
Prepare an iOpener for softening the adhesive on the back of the Note8.
Apply the iOpener on the back of the Note8 along the side with the power button.

I used a heat gun to soften the glue - worked it around the edges, moving the heat gun quickly. As this is my first attempt, I’m still calibrating on this - but other guides mention getting the back cover hot enough so as it’s just too hot to touch. I also have a temp probe on my multi-meter, and I measured appx. 75 deg. C.

One of the other guides showed using a electronics hot plate set to 105 deg C for 60 sec.

Phil Brooks - 26/05/20

Step 2

Use a suction handle to lift the back cover and create an opening pick to get in the gap.
Since the back cover is also slightly curved at the edges you want to insert the opening pick at a lower angle from underneath.
Start at the middle of the side and cut the adhesive while pulling up with the suction handle.
Be careful not to lever the opening pick too much to avoid breaking the back cover. Rather pull with the suction handle and use the pick for cutting the adhesive.
Move the pick towards the bottom corner and leave it there to keep the adhesive from resealing to the case.
Use another pick and move it to the top corner.
If it's getting harder to move the pick you might need to reheat the iOpener and apply it to the back cover again.

I used an X-acto knife with the flat blade to get it started. I tried using the suction cup - but it’s difficult to get good leverage. Once I got the cover started - I used the metal pry tool (sharpened with a dremel file) and a business card to work it open.

This is definitely the hardest part.

Phil Brooks - 26/05/20

Once off I see all the glue on the curved part of the chassis NOTON THE BACK. Apply heat to curved edges.

Lyle Walsh -

Step 3

Again take another opening pick and carefully move it around the corner and along the top edge.
Reheat with an iOpener if necessary.
Leave the pick at the top right corner to keep the adhesive from resealing.

Step 4

Rotate the device and start to separate the adhesive at the bottom with another opening pick.
Leave the pick at the bottom right corner to keep the adhesive from resealing.

Step 5

When the adhesive has been separated on all three sides properly you will be able to slowly lift the back cover.
Don't force it open. Use an iOpener to again soften the adhesive if the back cover won't come off or starts to bend.
Pay attention to the fingerprint sensor connector when flipping the back cover open. You might need to disconnect it as described in the next step.

I broke the back camera cover for the NUT 8 and then I bought a commercial cover and installed it but the quality of the picture became very bad and my question is, do you know where to get the original cover at a reasonable price?

Loord Mohammad - 20/03/19

Step 6

Use a pair of tweezers to disconnect the fingerprint sensor.
The connector might already have come off when flipping the back cover open.

don't skip disconnecting the sensor, even if isn't still glued to the case. it has to move away from the NFC/charging coil assembly in order to free the latter so it can be lifted away from the battery.

a nonni mouse -

Step 7

Remove the back cover.
To prepare for the reassembly remove any remaining adhesive from the phone, and clean the glued areas with isopropyl alcohol and a lint-free cloth.

How do you swap the fingerprint sensor

Lukus Carr - 16/09/18

You can use a tweezer to swap the fingerprint sensor, you might be careful when doing the step 6, additionally, a tweezer will be helpful when reassemble the fingerprint sensor. please note that your new back cover needs to have the fingerprint adhesive on. most of the product did not have. i have get a LUVSS brand from amazon which came with all OEM adhesive and full set tools, even a B6000 glue, best option to go for replacing the note 8 back glass

ggmall - 01/11/19

Step 8

Remove the ten Phillips #00 screws.

Step 9

Use an opening pick at the top edge to get between the NFC antenna and charging coil assembly and the case.
Lever the top of the assembly out of the case.

Solve the problem of moisture during charging

moaed aljnapy -

Step 10

Carefully pull up the complete charging coil and NFC antenna assembly.
The bottom left part of the assembly is slightly glued down to the frame.

Step 11

Use the flat end of a spudger to disconnect the battery connector.

Step 12

Prepare an iOpener and apply it to the display for at least two minutes to loosen the adhesive beneath the battery. Reheat and reapply the iOpener as needed.
Alternatively or when the battery is blown up, you can apply some isopropyl alcohol under each corner of the battery and allow it to penetrate for several minutes to help weaken the adhesive.

Isopropyl alcohol worked great but flooded the main board and took all night to dry out

Lyle Walsh -

Step 13

Use the flat end of a spudger to pry up the battery from the top right corner.
You will be prying against the case directly above the mainboard. Pry carefully to avoid damaging any close components.
You may need to reheat and reapply the iOpener repeatedly to further soften the adhesive. The adhesive is tough and it may take a few tries to get the spudger started under the battery.
Use the spudger to pry up the battery until you can insert an opening pick to prevent the adhesive from resealing.
Try your best not to deform the battery during this process. Soft-shell lithium-ion batteries can leak dangerous chemicals, catch fire, or even explode if damaged. Do not use excessive force or pry at the battery with metal tools.

I really think this is much less risky if you just take out the motherboard. There is much less risk to heat the other components when you are loosening the battery adhesive and you can be more rough when getting the battery out. Especially (but not exclusively) if you are changing the screen anyway. Should be after step 29.

Additionally, I went at the battery from the side with a credit card and prying out the battery evenly across the length of the battery. I was even able to make a ‘ridge-peek’ from the card and screen and heat it from above while pushing down on the card and prying at eh same time. I got it out without any battery deformation. I would get one of those flat credit card shaped tools if I did it again because the credit card deformed and I had to keep flipping it.

tobinmckenna - 14/11/19

Didn’t need to heat or use alcohol to get the battery out - just gently kept prying. I used the metal pry tool that came with the battery replacement tool kit. But very careful not to puncture the old battery.

Phil Brooks - 26/05/20

Step 14

Use the flat end of the spudger to pry up the top left corner of the battery where the flex cable is located.
Slide the spudger along the side of the battery to break apart remaining adhesive.
When prying keep to the areas marked orange. Avoid the red area in the middle which is the back of the display.

Step 15

Lift the battery out of the case.
Do not reuse the battery after it has been removed, as doing so is a potential safety hazard. Replace it with a new battery.
Remove any remaining adhesive from the phone, and clean the glued areas with isopropyl alcohol and a lint-free cloth.
Follow this guide to install battery adhesive.
Follow this guide to install custom-cut adhesives.

do you mean when replacing display the battery should also be replaced?

John Kenneth - 02/01/20

Hi John,

Since you can replace the display without removing the battery, you do not need to replace the battery.

Arthur Shi - 02/01/20

Great guide!

Quick note. If you are changing out the back cover or cant get touch ID reconnected Warm it up some on the back cover. It should pop right off with a spudger. Then reattach it inside the phone. Make sure the adhesive on back cover is sticky enough to hold it in place. Then set back cover on top!

jake765111 - 16/03/21

Step 16

Insert a SIM card opening tool into the small hole on the left side of the top edge of the phone.
Press to eject the tray.
Remove the SIM card tray from the phone.

Step 17

Remove the six Phillips #00 screws on the loudspeaker assembly at the bottom of the phone.

Step 18

Use the flat end of a spudger to pry up the loudspeaker assembly.
You will be prying above the mainboard and the antenna cable. Pry carefully to avoid damaging any close components.
Remove the loudspeaker assembly.

Step 19

Remove the two coax cables running from the daughterboard to the motherboard.
If you want to replace your display assembly with frame it is not absolutely necessary to remove the coax cables. However we advise to do so to avoid damage or tension on them.
Use a pair of tweezers to carefully disconnect both ends of the white coax cable and remove it.

Step 20

Use a pair of tweezers to carefully disconnect both ends of the blue coax cable and remove it.

Step 21

Use the flat end of a spudger to disconnect both the display and the touchscreen cables.

Step 22

Use the flat end of a spudger to disconnect the power button flex cable.
Disconnect the flash and proximity sensor cable.

Step 23

Use the flat end of a spudger to disconnect the flex connector of the front facing camera.
Carefully remove the front facing camera with a pair of tweezers.

Step 24

Use the flat end of a spudger to disconnect the flex connector of the iris scanner.
Carefully remove the iris scanner with a pair of tweezers.

Step 25

Remove the five Phillips #00 screws that hold down the motherboard, daughterboard, headphone jack and the charging port.

Step 26

Use the flat end of a spudger to disconnect the headphone jack flex connector.
Carefully remove the headphone jack with a pair of tweezers.

Step 27

Prepare an iOpener and apply it to the bottom part of the phone to loosen the adhesive beneath the microphone flex cable.
Use a pair of tweezers to carefully lift the microphone out of its recess and loosen it from the mid frame.
Do not remove the microphone. It is still attached to the daughterboard.

Step 28

It is possible to remove the motherboard whilst keeping the daughterboard in its place. However the flex connector of the daughterboard sits on the backside of the motherboard and it's a bit of a fumbling to disconnect it while you're holding the motherboard in your hand.
In case you're planning to remove the motherboard without the daughterboard take especially care not to damage any surrounding components whilst disconnecting the flex cable.
Use the pointed end of a spudger to pry up the motherboard until you can get a good grip.
The motherboard sits loosely on the mid frame so there are different positions to place the spudger and to pry it up. Avoid to damage any surrounding components.

Step 29

Carefully lift up the motherboard.
To lift the daughterboard out of its recess pull both components slowly towards the upper end of the phone whilst lifting upwards.

Samsung Galaxy Note8 Motherboard prereq

Introduction

Tools

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Author

Dominik Schnabelrauch

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