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Fingerprint sensor on Galaxy A50

Discussion in 'Android Devices' started by AchnatonSVK, Oct 5, 2021.

  1. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

    Hello dear friends!

    I came here for your help. Recently, I get my hands on Samsung Galaxy A50 (SM-A505FN/DS) with Android 11 and One UI 3.1. I get the phone with broken screen, so I replaced it with OEM part. Everything works just fine. I place everything from old case to new (with new screen). And everything is okay. But problem is, when I try to add fingerprint, phone leads me trough setting up screen, but when I place my finger on the sensor, I get message "Be sure your finger covers whole sensor". And it won't even get anywehre. It just immidiately drops to zero and repeats the message...I tried factory reset, soft reset, update and *#0*# and checked the sensor with everything passed...Is there any solution available?

    Samsung Galaxy A50 (SM-A505FN/DS). Android 11 One UI 3.1

    Base: A505FXXS9CUF1
    Core: 4.14.113-21578
    Build Number: RPA1A.200720.012.A505FNXXS9CUH3
    Knox 3.7
    Security 1.august 2021

    Thank you kindly for any help! Stay Safe
     



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  2. Unforgiven

    Unforgiven ...eschew obfuscation...
    Moderator

    Is it under the display? Was it part of the replacement display? Does a sensor test say if it is working?
     
  3. Unforgiven

    Unforgiven ...eschew obfuscation...
    Moderator

  4. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

    Yes, it is under display. No the sensor was part of the original phone. I moved it with motherboard, etc. to new display. Sensor test is showing everything as PASS...
    Sensor info is showing Product ID as ET713 also with UID, EFS UID, Module Test: 0 and Calibration 0
     
    Unforgiven likes this.
  5. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

  6. Unforgiven

    Unforgiven ...eschew obfuscation...
    Moderator

    Yeah, that was an old app. A friend recommended this more updated app to me. It detects my FP scanner.
    https://play.google.com/store/apps/details?id=flar2.devcheck

    I'm thinking if it wasn't attached to the screen, there should be no reason it wouldn't work unless it is obstructed somehow, like not mounted in the exact same location, obscured by a label, wire, or something else.
     
  7. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

    Still no luck unfortunately...all sensors ale listed, except fingerprint...maybe I'm blind, but it isn't there...It was attached to the same location with two screws...right under LCD (where is rounded hole for sensor). I didn't touched the sensor or LCD...just extracted it and then imidiately placed to the new LCD, connected and tightened with screws....
     
  8. Unforgiven

    Unforgiven ...eschew obfuscation...
    Moderator

    We may be getting somewhere. On my Galaxy S20 it shows up under Fingerprint sensor as QCOM. Yours shows nothing? If that is the case it would imply the system isn't seeing it. That could be a loose connection or damaged wire, or possibly whatever damaged the screen damaged the sensor.
    upload_2021-10-5_16-2-45.png
     
  9. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

    Ah, I probably missed it....Now when I looke at the place, like you show me, it's showing me Fingerprint sensor: EGISTEC. So I'm assuming it recoginzing my fingerprint sensor...As I stated on the first post, it lets me create fingerprint, but when I place my thumb (no matter how), it says, that I need to cover the whole sensor (which Im doing)....So when I put my finger there, it shows loading but immidetaily it goes backwards (0% - not even 1%) and the message...
     
  10. Unforgiven

    Unforgiven ...eschew obfuscation...
    Moderator

    Ah, I misread and thought you were having problems registering your fingerprint. :(
     
  11. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

    No you dont...maybe I'm explainig like i***t probably :D I have problem registering my fingerprint. The process which I mentioned above, is when I try to set up Fingerprint unlocking...
     
    Unforgiven likes this.
  12. Unforgiven

    Unforgiven ...eschew obfuscation...
    Moderator

    I'll keep looking around. It must be something fixable if it does a partial recognition.
     
  13. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

    I will be very thankful because I'm helpless...Thank you
     
  14. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

    Still nothing? :/
     
  15. AchnatonSVK

    AchnatonSVK Lurker
    Thread Starter

    SOLUTION: I bought OEM OLED display, which was not original so the sensor can not work properly. Changing to ORIGINAL one have solved this problem.
     
  16. ScarlettM59

    ScarlettM59 Member

    In-finger print sensor for mid and low end device are always causing problems, I have same phone and sold it for the same reason. Try using mid range device with physical finger print sensors only.
     

Samsung Galaxy A50s Forum

The Samsung Galaxy A50s release date was September 2019. Features and Specs include a 6.4" inch screen, 48MP camera, 4/6GB RAM, Exynos 9611 processor, and 4000mAh battery.

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