How to Fix a Samsung Galaxy Fingerprint Scanner That Is Not Working

If your Samsung Galaxy fingerprint scanner is failing to recognize your fingerprint, it can be both frustrating and inconvenient. This guide outlines several methods to troubleshoot and resolve the issue, ensuring that your device’s security features function properly.

1. Clean the Fingerprint Scanner

Cleaning the sensor can remove dirt, oils, and debris that may obstruct its functionality.

Power Off the Device: Turn off your Samsung Galaxy to prevent accidental inputs during cleaning.
Use a Microfiber Cloth: Gently wipe the fingerprint scanner area with a clean, dry microfiber cloth to remove surface dirt.
Apply Isopropyl Alcohol (Optional): If necessary, lightly dampen the cloth with isopropyl alcohol to remove stubborn residues—avoid over-wetting the area.
Let It Dry: Allow the sensor area to air dry completely before powering the device back on.

2. Remove and Re-register Your Fingerprint

Re-registering your fingerprint can recalibrate the sensor for improved accuracy.

Open Settings: Navigate to the Settings menu on your device and tap on Biometrics and Security (or a similarly labeled section).
Delete Existing Fingerprints: Select the fingerprint management option and remove any previously saved fingerprint data.
Register a New Fingerprint: Follow the on-screen instructions to add a new fingerprint; ensure your finger is clean and positioned correctly on the sensor.
Test the Scanner: Lock and unlock your phone using the newly registered fingerprint to confirm that the scanner is now working properly.

3. Update Your Software

Updating your software can resolve bugs that might be affecting the fingerprint scanner’s performance.

Access Software Update: Open Settings and scroll down to find Software Update or System Updates.
Check for Updates: Tap on the update option to search for any available system updates.
Download and Install: If an update is available, follow the prompts to download and install it.
Restart Your Device: Once updated, restart your phone and test the fingerprint scanner to see if the issue has been resolved.

4. Remove Interfering Accessories

Accessories like screen protectors or cases may interfere with the fingerprint scanner’s accuracy.

Inspect Your Accessories: Check if your case or screen protector overlaps the area of the fingerprint sensor.
Temporarily Remove Accessories: Remove the case and/or screen protector to eliminate any potential interference.
Test the Sensor: Use the fingerprint scanner to determine if its performance improves without the accessory.
Consider Alternatives: If the sensor works better without the accessory, look for a case or screen protector designed specifically for your Samsung Galaxy that accommodates the fingerprint scanner.

5. Restart Your Device

Restarting the device can clear temporary software glitches affecting the fingerprint scanner.

Hold the Power Button: Press and hold the power button until the power menu appears on your screen.
Select Restart: Tap the Restart option and allow your device to reboot completely.
Test the Fingerprint Scanner: Once your phone has restarted, try using the fingerprint scanner again to check if the issue persists.

6. Inspect for Physical Damage

Physical damage or obstructions around the sensor can impair its performance.

Examine the Sensor Area: Visually inspect the fingerprint scanner for any signs of cracks, scratches, or other physical damage.
Look for Debris: Check for any foreign particles or smudges that might not have been removed during cleaning.
Clean Carefully: If any debris is found, gently clean the area again using a microfiber cloth, ensuring not to apply too much pressure.
Assess for Further Action: If you notice significant damage, it may require professional attention rather than simple troubleshooting.

7. Contact Samsung Support or a Professional Technician

If the issue remains unresolved, professional assistance can help diagnose and fix deeper hardware or software problems.

Document the Problem: Make note of your device model, the symptoms observed, and all troubleshooting steps you have attempted.
Check Warranty Status: Verify whether your device is still under warranty, as this may cover repairs or replacement.
Visit the Samsung Support Website: Look up official troubleshooting guides and contact details on Samsung’s support portal.
Schedule a Service Appointment: Contact Samsung customer service or visit an authorized service center for further diagnosis and repair.