The Apple iPhone 5s was announced on September 10, 2013. Repair of this device is similar to the previous models, and requires screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Silver, Gold, and Space Gray.

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What is the black substance around components On logicboard

Hi. I was just trying to reball an ic but when trying to remove it from the board I noticed this black adhesive/cement stuff around it?

Is there a way to remove this?

I have tried the heat gun at max temperature but this did not soften it?

This is my first board repair and am using a dead board to practice on so not worried about the board.

Thank you


I used a bit of force and the ic came off but also took a pad with it.

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trevor, sounds like an epoxy underfill. That is to stabilize the IC on a logic board. Add an image of the IC, its location and the damage so we can see what you see. Take a look at this video and see if it explains it.

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the video is right. Have been checking online and heat with gentle scraping is the only way to remove it.

Tried taking a photo of the damage but it doesn't come out well in the pics.

It's just one pad under the baseband chip. All the others are intact.


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trevor will be eternally grateful.
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