Physical & water damage

Fingerprint sensor stopped working

A fingerprint sensor that suddenly stops recognizing your print is usually a software or cleanliness issue, but can follow screen or button repairs and drops.

Difficulty
Easy
Time
10–15 minutes
DIY cost
$0
Pro cost
$0–$80 if a connector needs reseating

Symptoms

  • Sensor doesn't respond to touch at all
  • Phone repeatedly says 'fingerprint not recognized'
  • Started after a screen replacement or drop

Likely causes

  • CommonDirty or wet sensor surfaceOil, moisture, or a screen protector covering the sensor can block reads.
  • CommonFingerprint data corrupted or needs re-enrollmentRe-adding your fingerprint often resolves recognition issues.
  • PossibleSensor cable disconnected during a screen or button repairCommon after a recent repair if the technician didn't reconnect it properly.

What to do

  1. Clean both your finger and the sensor area with a dry cloth.
  2. Remove any screen protector covering an in-screen fingerprint sensor and test again.
  3. Delete the saved fingerprint in settings and re-enroll it from scratch.
  4. Restart the phone, since sensor drivers can glitch after updates.
  5. If the sensor stopped right after a screen replacement or drop, suspect a loose internal connector and see the shop that did the repair or a new technician.

When to call a pro

If the sensor stopped working right after a repair or drop, a technician can check whether its internal cable is properly connected.

Safety

Generally low risk

Generally low risk for a careful person. Stop if anything looks different from what this guide describes.

Related guides

Operator provides AI-generated troubleshooting information. It can be wrong. For safety-critical, electrical, gas, structural, medical, automotive safety, or other high-risk problems, consult a qualified professional.