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Model A1419 / Late 2012 / 2.9 & 3.2 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac13,2

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Display Falls Off After Repair - New Adhesive Not Sticking Properly

I've opened up a late 2012 iMac to replace the stock HDD with a Samsung Evo SSD. The computer was up and running and I restored everything etc. But after removing the old adhesive and putting on the new double sided adhesive tape from iFixit, the screen feel off, not one but 2x (I used new adhesive each time and removed most of the old adhesive as well).

Is there any trick to get the display to bond with the iMac frame/desktop itself? I'm getting worried about the display cracking and it's generally frustrating to keep spending money rebuying new adhesive. I used the included suction cups the 2nd time around, hoping that the pressure of those would help the screen and frame bond firmly & securely… but had no luck with that method obviously.

Thanks very much in advance for any tips and suggestions!

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I always use the cut strips and I don’t have displays falling off! I don’t recommend using Tesa tape which is great stuff but! Is not designed to be removable in the same way. The iMac tapes are designed so the pizza cutter is able to break the adhesion.

So why are you have a problem??

How you clean the surfaces is the key here! Rubbing alcohol or cheap isopropyl alcohol have impurities which leave a film on the surface which interferes with the adhesion!

I always use reagent quality isopropyl alcohol 85% or better after I’ve used another solvent to remove the adhesive.

I use Goof Off Or other Citrus oil based Cleaner after scrapping the tape off using a Plastic Razor Blade. I use a micro cloth strip wrapped over the blade which has been wetted with the Goof Off. Which is based on a natural solvent from orange peel called d-limonene. I then go over the surfaces again with the same approach a fresh strip using the isopropyl alcohol.

In addition I apply a bit pressure and mild heat to the edge after setting the glass. I also use a rubber roller to help press the display into the tape I also leave the screen in the up position for the night so the weight of the screen is pressing down.

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FYI - I've damaged the display when someone had used Tesa tape please don't do it!


I'll get a roller and use the alcohol to clean all the old adhesive off. But when you say leave the screen in the up position I assume you mean just tilt it up via the hinge? I also don't have a heat gun, but I wil get one for future projects.

Thanks for your response.


Fully horizontal flat on its back.

This allows the capillary bonding to finish between the adhesive and the metal and glass surfaces. The heat of the heat gun (mild) speeds it up the pressure from the roller makes sure the surfaces are fully engaged with each other.


My trick to getting the old stuff off is to start pulling it up at one end and then just peal it off like tape. I very rarely have to use any adhesive remover. When I do I use GooGone.


@mayer - Yes, I do the same! Pulling slowly also helps not to leave residue.


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First of all, are you using Tesa tape or the iMac Adhesive Strips?

Update (10/21/2018)

I think Dan can handle this one from here. Thanks for stopping by Dan!

Imagem de iMac Intel 27" (2012-2019) Adhesive Strips


iMac Intel 27" (2012-2019) Adhesive Strips


Imagem de Tesa 61395 Tape


Tesa 61395 Tape


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I'm using the iMac adhesive strips. Also, I managed to remove all but a tiny portion of the old tape... it didn't peel off like the rest. It was all gooey and sticky. I didn't want to scratch anything too badly.


@mrreis1990 - use the plastic razor blades to fully remove the adhesive. You don't want anything on the surfaces as that will interfere with the adhesion as well (fully clean).


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