Fix Broken Hinges on OnePlus 9 Case After Drop

Introduction

When a OnePlus 9 case falls from a table or gets knocked against a hard surface, the hinge that allows the case to open and close can become bent, cracked, or completely broken. A damaged hinge not only looks unsightly but can also hinder the case’s ability to protect the phone and may cause the case to become loose or jammed. While many people simply replace the entire case, fixing a broken hinge can be a satisfying DIY project that saves money and keeps your phone’s aesthetic intact.

This guide walks you through every step of inspecting the damage, selecting the right repair method, and reassembling the hinge so that your OnePlus 9 case functions like new again.

Gather the Right Tools and Materials

Before you begin, make sure you have all the supplies at hand. Having the right tools reduces the chance of accidental damage during repair.

Image of the required tools

Inspect the Damage

Carefully examine the hinge area for the following signs:

1. Visible cracks – A straight line across the hinge plate or small fissures that may have widened.
2. Bent or misaligned pins – The metal pin that connects the two hinge plates may be visibly out of line.
3. Loose parts – If the hinge plates separate when you open or close the case, the connecting pin or screws may have come loose.
4. Wear or rust – Particularly if the case was dropped in a damp environment.

Take a close look under good lighting or with a magnifying glass. Note which components are damaged and which remain intact.

Decide on a Repair Approach

You have two main options: repair the existing hinge or replace it entirely.
Choosing depends on the extent of damage, the cost of replacement parts, and how comfortable you are with DIY work.

Repairing the Hinge

If the hinge plates are cracked but not completely broken and the pin is still usable, you can bond the cracks with epoxy or silicone. This preserves the original hinge’s shape and fit.

Replacing the Hinge

If the hinge is completely broken or the pin is bent beyond repair, you may need a new hinge kit. These kits typically include a new hinge plate, pin, and screws that are designed to fit the OnePlus 9 case.

Step‑by‑Step Guide: Repairing the Hinge

1. Clean the Area

• Dampen a cotton swab with isopropyl alcohol.
• Gently wipe the hinge plates, pins, and any cracks.
• Use a microfiber cloth to remove excess alcohol and let the area dry completely.

Clean surfaces improve adhesive bonding.

2. Prepare the Adhesive

If you’re using epoxy, combine the resin and hardener in a 1:1 ratio on a disposable surface. Mix thoroughly until the mixture is uniform.
For silicone, squeeze a small amount onto the mixing spatula and mix with a little silicone if necessary for better flow.

3. Apply Adhesive to Cracked Areas

• Using a paintbrush or cotton swab, apply a thin bead of adhesive along the crack lines on both hinge plates.
• Avoid excess; too much adhesive can seep into the hinge pin slot and cause jam.

4. Reassemble the Hinge

• Carefully line up the hinge plates so that the cracks meet.
• If your case uses a pin, gently insert it into the slot, ensuring it sits flush.
• Press lightly to bring the plates together.

5. Secure While Curing

• Place a small clamp or a light weight on the hinge to hold the plates together.
• Alternatively, wrap a clean cloth around the hinge and tape it in place.

Leave the adhesive to cure as recommended by the manufacturer (usually 24 hours for epoxy, 4‑6 hours for silicone).

6. Test the Function

• Open and close the case several times.
• Check for smooth motion and that the hinge does not wobble or feel loose.

If the hinge still feels weak, repeat the adhesive process or consider a replacement.

Step‑by‑Step Guide: Replacing the Hinge

1. Remove the Old Hinge

• If the case has screws, unscrew them with the flat‑head screwdriver.
• Use tweezers to gently pull the hinge plates away from the case body.
• If the plates are glued, carefully pry them with a plastic opening tool, taking care not to damage the case material.

2. Acquire a Replacement Kit

• Search for “OnePlus 9 hinge replacement kit” from reputable electronics parts suppliers.
• Verify that the kit includes a hinge plate, pin, and screws that match your case model.

3. Install the New Hinge

• Place the new hinge plates into the case where the old ones were.
• Insert the new pin and tighten the screws (if applicable).
• Ensure that the hinge lines up correctly and that the plates are flush with the case body.

4. Secure the Hinge

• Apply a small amount of silicone along the contact surfaces to bond the hinge to the case.
• Allow it to cure for at least 4 hours before using the case.

5. Verify Functionality

• Open and close the case repeatedly to confirm smooth operation.
• Check for any resistance or looseness.

Image of a replacement hinge kit

When to Seek Professional Help

If you are uncomfortable working with adhesives, or if the hinge damage is severe (multiple cracked plates, broken pin, or structural damage to the case body), it may be best to take the case to a professional repair service. Professional technicians can use specialized tools and materials to ensure a durable repair.

Preventing Future Hinge Damage

1. Use a high‑quality case – A case with reinforced hinges is less likely to suffer damage.
2. Avoid dropping the phone on hard surfaces – A simple habit change can save the hinge.
3. Apply a protective sleeve – Extra padding at the hinge can absorb shock.
4. Check hinges regularly – Small cracks can be repaired before they become serious.

Final Thoughts

Fixing a broken hinge on a OnePlus 9 case after a drop is not just a cost‑saving exercise; it also gives you control over the longevity and appearance of your phone’s protection. By carefully assessing the damage, selecting the appropriate repair method, and following a detailed step‑by‑step process, you can restore your case’s functionality and enjoy your phone without worry.

If you ever find yourself unsure or the repair seems beyond your skill level, remember that professional services are available, and sometimes a fresh, new case can be a worthwhile investment. Happy repairing!