Cracking your phone glass doesn't mean you need to buy a brand new device or pay high service fees. If you've dropped your phone and ended up with a shattered digitizer or a blank liquid crystal display panel, you can fix it yourself with patience and the right tools.
This hands-on manual walks you through swapping out a broken assembly on your Huawei Nova 3i, covering tool preparation, internal ribbon cable handling, and final reassembly. Whether you're dealing with unresponsive touch input or internal bleeding pixels, this walkthrough sets you up for a successful repair.
Tools and Parts Needed for the Job
Before opening up your chassis, gather your workshop gear. Working on modern electronics requires precision components to avoid stripping tiny fasteners or cracking the rear glass panel.
- A brand-new replacement screen assembly (LCD and digitizer combo) for the Huawei Nova 3i model INE-LX1.
- A heat gun or hair dryer to soften the factory adhesive.
- Precision Phillips and pentalobe screwdrivers.
- Plastic opening picks and thin plastic cards.
- A heavy-duty suction cup handle.
- Fine-tipped tweezers and a non-conductive spudger.
- Isopropyl alcohol (90% or higher) and a lint-free microfiber cloth.
Step 1: Power Down and Remove the SIM Tray
Safety comes first whenever you open electronic hardware. Power off your phone completely to prevent electrical shorts on the logic board.
Insert a SIM ejection tool into the tiny pinhole located on the left side of the frame. Push inward firmly until the SIM and microSD card tray pops out. Slide the tray completely out of its slot and set it aside. This step stops the internal board from catching on the tray rails during later disassembly stages.
Step 2: Detach the Rear Glass Panel
The back cover of this device is held tightly in place by strong adhesive and plastic clips.
Turn the phone face down. Run your heat gun along the outer perimeter of the back glass for two to three minutes to soften the glue underneath. Keep the heat moving constantly to avoid melting the plastic mid-frame or damaging the internal battery.
Attach your suction cup near the bottom edge of the back glass. Pull upward gently on the suction cup while pressing a plastic pick into the narrow gap that forms between the rear cover and the frame. Once the pick is inside, slide it slowly along the perimeter to slice through the remaining adhesive.
Lift the back cover carefully like the cover of a book, hinging it toward the left side. Stop immediately. The fingerprint scanner cable is still plugged into the main board on the right.
Step 3: Disconnect the Fingerprint Sensor and Battery
With the rear cover propped open slightly, locate the metal bracket shielding the fingerprint sensor connector.
Unscrew the tiny Phillips fastener holding the bracket down, lift the shield away, and use your spudger to pop the fingerprint ribbon cable loose. You can now set the rear cover completely aside.
Next, find the battery cable connector on the motherboard. Pry it straight up with your plastic spudger to cut power to the system. Never skip this step; leaving the battery plugged in while disconnecting screen ribbons can easily fry your logic board.
Step 4: Remove Internal Shields and Motherboard Components
To free the old screen's flex cables, you must clear away blocking components.
Unscrew the metal shields protecting the main display ribbon cables and upper circuit connections. Keep your screws organized on a magnetic mat because they vary in length. Disconnect the antenna cables and secondary flex lines carefully.
Remove the screws securing the lower loudspeaker box and pull it out of the chassis. If the board resists, a light touch with a plastic spudger will break any remaining light adhesive. Unplug the front camera connector and lift the main logic board out of the housing if your replacement frame requires a completely bare chassis transfer.
Step 5: Separate the Broken Screen and Clean the Frame
Apply heat evenly around the front edges of the shattered screen to soften the front display adhesive.
Insert a thin razor blade or opening pick under a corner of the glass panel. Pry upward gently while working your way around the edges. Watch out for flying glass shards if the panel is severely damaged.
Once the old display panel is removed, clean out all old glue, dust, and glass fragments from the inner rim of the plastic frame. Use isopropyl alcohol on a cotton swab to wipe down the mating surfaces. A clean frame ensures your new screen sits flush without lifting or creating light leaks.
Step 6: Test and Install the New Display Assembly
Before applying permanent adhesive to your new screen, dry-fit it to test functionality.
Plug the new screen's flex cable into the motherboard and reconnect the battery temporarily. Power on the phone and check touch responsiveness across every inch of the glass. Verify that colors look sharp and no dead pixels appear. Once verified, power down the device and unplug the battery again.
Apply precision pre-cut adhesive strips or a thin line of specialized B-7000 glue to the frame. Route the new display cable through the frame slot, press the screen firmly into place, and clamp or weight the phone for at least 45 minutes to let the bond cure properly.
Common Mistakes to Avoid
- Rushing the heat application: Forcing a cold back cover or screen will crack the glass instantly. Take your time softening the glue.
- Forgetting to disconnect the battery: Leaving the battery active while unplugging screen ribbons causes short circuits.
- Mixing up screw lengths: Putting a long screw into a short motherboard hole can pierce internal traces and permanently brick the device.
- Skipping the dry test: Always test the replacement screen before peeling off protective liners or applying permanent glue.
Frequently Asked Questions
Do I need to transfer the earpiece speaker mesh?
Yes, replacement screens often ship without the metal mesh grill protecting the top earpiece speaker. Peel it off your old screen carefully with tweezers and stick it into the new assembly.
Can I reuse the factory back cover adhesive?
No, factory adhesive loses its tack once peeled. Always clean off the old residue and use fresh double-sided adhesive tape or liquid craft glue to seal the back glass securely.
What should I do if touch input is erratic after assembly?
Power down the phone, reopen the chassis, and check the display flex connector. Dust or an unseated plug is usually the culprit behind ghost touches or unresponsive spots.
Is it normal for the new screen to feel slightly raised?
No, a raised screen usually means old adhesive residue remains trapped inside the frame channel. Clean the housing thoroughly down to bare plastic before final installation.
