How to remove and replace a fingerprint display on a new screen

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How to Remove and Replace a Fingerprint Display on a New Screen – Expert Guide + 15 Easy Steps

Introduction to Fingerprint Display Technology

Fingerprint sensors have evolved from physical buttons to under-display technologies. Most modern smartphones integrate fingerprint readers within OLED screens, especially on flagship Android devices. This innovation enhances both security and design but makes repairs a bit more technical.

Whether your phone is a Samsung Galaxy, Google Pixel, or another flagship model, under-display fingerprint scanners are delicate and require a precise approach for removal and replacement. Knowing how to manage this repair can save you time, money, and future frustration.

broken asus rog phone 7 screen before and after
broken asus rog phone 7 screen before and after

Common Reasons for Fingerprint Display Failure

There are several causes for fingerprint scanner issues on modern smartphones:

  • Cracked Screen: A broken screen can damage the sensor underneath.
  • Water Ingress: Moisture can seep through and short-circuit the sensor.
  • Wear and Tear: Long-term use may reduce sensitivity and reliability.
  • Improper Repairs: If your screen was previously replaced incorrectly, the sensor might not be aligned or seated properly.

Early signs of trouble include delayed fingerprint recognition, the sensor not lighting up, or the phone failing to respond to your touch altogether.

Tools and Materials Needed for the Replacement

Must-Have Repair Tools:

  • Precision screwdriver kit (Phillips, Pentalobe, Torx)
  • Plastic pry tools and suction cup
  • Isopropyl alcohol (90%+)
  • Anti-static gloves
  • Tweezers
  • Heat gun or hot plate
  • Soft microfiber cloth

Safety Gear and Workspace Preparation:

  • ESD-safe mat
  • Eye protection (to prevent shards from cracked glass)
  • Clean, well-lit workbench
  • Magnetic project mat for organizing screws and parts

Using the right tools prevents accidental damage to the logic board, battery, or display flex cables.

Safety Precautions Before You Start

Before diving into the repair:

  • Back up your data to avoid data loss in case the phone doesn’t reboot properly.
  • Power off the phone completely.
  • Disconnect the battery as early as possible during disassembly.
  • Never apply excessive pressure when removing components.
  • Avoid touching the fingerprint sensor directly with your fingers.

If you’re unsure about handling delicate electronic parts, it’s always wise to consult a technician.

Step-by-Step: Removing the Old Fingerprint Display

Powering Down and Disassembling the Phone

  1. Turn off the phone completely.
  2. Remove the SIM card tray.
  3. Heat the edges of the screen using a heat gun to soften the adhesive.
  4. Use a suction cup to gently lift the screen while inserting plastic tools to separate it.

Detaching the Damaged Display Safely

  1. Carefully detach the screen flex cables connected to the motherboard.
  2. Remove the fingerprint sensor flex cable if it’s separate.
  3. Use isopropyl alcohol to loosen any adhesive.
  4. Gently pry out the fingerprint sensor without tearing the flex.

Cleaning the Residue and Inspecting the Frame

  1. Remove any glass shards or adhesive from the frame.
  2. Inspect for dented corners or damaged cable connectors.
  3. Wipe the area with a lint-free cloth and alcohol to prep for the new screen.

Step-by-Step: Installing the New Fingerprint Display

Placing the New Screen with Fingerprint Sensor

  1. Align the new screen and ensure the fingerprint sensor is correctly seated.
  2. Connect the fingerprint sensor to the motherboard.
  3. Apply a new adhesive layer if needed.

Connecting Flex Cables and Testing the Sensor

  1. Reconnect all display and fingerprint flex cables.
  2. Temporarily power on the device to test fingerprint registration.
  3. If it passes, power off the phone and complete reassembly.

Reassembling the Device

  1. Reconnect the battery.
  2. Close the device carefully and secure with screws.
  3. Reinsert the SIM tray and boot the phone.

Testing and Calibrating the New Fingerprint Sensor

After installation:

  • Go to Settings > Biometrics to set up your fingerprint again.
  • Check for lag, missed reads, or sensitivity issues.
  • Update your firmware to ensure optimal sensor performance.

If the fingerprint scanner doesn’t work right away, double-check cable connections or consult a technician.

Post-Installation Tips for Long-Term Sensor Health

  • Avoid applying thick screen protectors that interfere with fingerprint sensors.
  • Clean the screen regularly with a soft microfiber cloth.
  • Don’t expose your phone to high humidity or water, even if it’s IP-rated.

Handle your phone with care to extend the lifespan of the screen and sensor.

When Should You Seek Professional Help?

You should seek expert help if:

  • You don’t have the proper tools.
  • Your phone won’t power back on after reassembly.
  • You damaged the flex cable or connector.
  • The fingerprint sensor doesn’t respond even after calibration.

Advantages of Professional Repairs at Sydney CBD Repair Centre

SydneyCBDrepairCentre-Team-Front-Smile.jpg

At Sydney CBD Repair Centre, we offer:

  • Genuine OEM screens with integrated fingerprint sensors
  • Professional calibration for reliable fingerprint recognition
  • Same-day service for most models
  • 90-day warranty on all repairs

Our technicians are trained to handle delicate components with precision, ensuring you get the best results without any risk.

Cost of Replacing a Fingerprint Display in Sydney

Prices vary depending on phone model and screen type. As of 2025:

Phone Model Estimated Cost (AUD)
Samsung Galaxy S22 Ultra $380 – $450
Google Pixel 7 Pro $340 – $420
OnePlus 11 $300 – $390

Note: Prices include genuine screen + fingerprint sensor and labor. Contact Sydney CBD Repair Centre for the latest quotes.

FAQs

1. Can I replace the fingerprint sensor without replacing the screen?

In most modern phones, the fingerprint sensor is embedded under the screen. Replacing the sensor alone usually isn’t possible.

2. Will a new screen affect fingerprint performance?

Only if it’s not OEM or installed incorrectly. Genuine parts retain full functionality.

3. How long does it take to replace a fingerprint display?

DIY might take 2–3 hours. At Sydney CBD Repair Centre, it’s usually done same day.

4. Is it safe to use a third-party screen?

Third-party screens may not support fingerprint sensors or may degrade over time. Always choose OEM if fingerprint recognition is important.

5. Can water damage affect the fingerprint scanner?

Yes. Moisture can short the sensor or damage flex cables. Immediate repair is recommended.

6. Will I lose data during screen replacement?

No, but always back up your phone before a repair just in case.

Conclusion

Replacing a fingerprint display isn’t a task to take lightly. It requires careful disassembly, high-quality parts, and precise installation. Whether you’re confident doing it yourself or prefer expert help, it’s essential to use genuine components and follow safety protocols.

For Sydney residents, Sydney CBD Repair Centre is your trusted choice for expert fingerprint display repairs. With thousands of satisfied customers and genuine parts guaranteed, you’re in good hands.