Mobile Fingerprint Sensor Not Detecting – Repair Guide
Mobile Fingerprint Sensor Not Detecting – Repair Guide
🔍 Common Causes
1. Dirty or Scratched Sensor – Dust, sweat, or scratches block recognition.
2. Software Glitch – System bugs or outdated OS.
3. Hardware Damage – Faulty flex cable or damaged sensor.
4. Moisture/Heat Exposure – Causes internal malfunction.
5. Improper Installation – After screen replacement or repair.
—
🛠 Step-by-Step Repair Guide
Step 1: Basic Cleaning
Gently wipe the sensor with a microfiber cloth.
Use isopropyl alcohol to remove dirt and oil.
Step 2: Software Check
Restart the mobile.
Delete old fingerprints → Re-add new ones.
Update OS/software.
Step 3: Safe Mode Test
Boot into safe mode.
If sensor works → Problem is with third-party apps.
Step 4: Hardware Inspection
Disassemble phone carefully.
Check fingerprint sensor flex cable.
Re-seat or replace faulty connector.
Step 5: Sensor Replacement
If still not working → Replace fingerprint module.
For in-display sensors, ensure proper alignment with OLED.
—
⚡ Pro Tips
Always test fingerprint after screen replacement.
Avoid pressing sensor with sharp nails or tools.
Use original replacement parts for accuracy.
