iPhone 14 Pro Max Repair: more than Display Module Reassembly but Battery Replacement

Evgenii Kuzmin

Senior maintenance service and repair engineer

Over twenty years as a repair engineer, specializing in advanced diagnostics, troubleshooting, and repair of electronic devices and gadgets. Expertise spans hardware solutions for smartphones, smartwatches, and cutting-edge electronics, delivering precision and innovation in every technical challenge.

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A customer brought in an iPhone 14 Pro Max with a loose display module—a noticeable gap on one side.

After carefully removing the display, we found the culprit: a swollen battery pushing the screen up from inside!

The photo shows damage to the battery’s corner casing. Obviously, just resealing the display wouldn’t fix this—a battery replacement was a must!

And here’s the root of the problem!

Some repair shops cut corners when replacing the back glass, skipping a full disassembly.

As a result, glass shards and debris from the original back panel get trapped inside. Over time, this debris can damage cables, the display, the front camera, or even the Face ID sensor.

But most often, it punctures the battery, causing it to swell. ๐Ÿ˜’

Prepping the new battery with adhesive for installation.

For a proper seal, we:

โœ” Remove old adhesive

โœ” Clean and degrease the surface

โœ” Apply primer (special bonding agent)

โœ” Install new high-strength adhesive tape

Same process for the display module:

โœ” Strip old adhesive residue

โœ” Degrease & apply primer

โœ” Reassemble the phone

โœ” Slightly heat the display for better adhesion

And that’s how a simple display resealing job turned into a battery replacement too! ๐Ÿ˜Š