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Ctwdubb
Asteroid

Phone reboots with enabled fingerprint scanner

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My note 9 reboots when I have the fingerprint scanner enabled.  This happens when I unlock the lock screen. The fingerprint scanner functions normally for authentication in apps and such. It reboots after unlocking the phone. I have done several troubleshooting tips listed in previous posts but to no avail. 

1 SOLUTION

Accepted Solutions
Ctwdubb
Asteroid

Re: Phone reboots with enabled fingerprint scanner

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I have deleted the account and  created another fingerprint scan. Everything appears to be working fine. No reboots since this morning. I will consider the matter closed at this time. Thanks.

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7 REPLIES 7
Samsung Moderator
Samsung Moderator

Re: Phone reboots with enabled fingerprint scanner

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Does this happen if you don't unlock the device with the fingerprint scanner? Does this happen if your unlock your device with your fingerprint in safe mode?

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Ctwdubb
Asteroid

Re: Phone reboots with enabled fingerprint scanner

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If i dont use the fingerprint scanner it works fine. I can simply unlock it with a code.  If i use the fingerprint scanner even in safe mode it reboots.  

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Samsung Moderator
Samsung Moderator

Re: Phone reboots with enabled fingerprint scanner

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Have you tried removing your Samsung account and re-adding it?

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Ctwdubb
Asteroid

Re: Phone reboots with enabled fingerprint scanner

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Negative.  Do you mean removing the fingerprint data or removing the account? If it's the account how di I do that?

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Samsung Moderator
Samsung Moderator

Re: Phone reboots with enabled fingerprint scanner

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In this case we would mean the whole account, you can do this under the settings under Backup and Accounts.


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Ctwdubb
Asteroid

Re: Phone reboots with enabled fingerprint scanner

JUMP TO SOLUTION

I have deleted the account and  created another fingerprint scan. Everything appears to be working fine. No reboots since this morning. I will consider the matter closed at this time. Thanks.

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Re: Phone reboots with enabled fingerprint scanner

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To all who see this, I also had this same issue. And I fixed it in just less than an hour. 

 

The fingerprint scanner on the Note9's and S9's do seem to not like moisture. I powered my Note9 off, and rested it on it's screen on a flat surface. 

 

I then took 99% rubbing alcohol and a Q-Tip and poured drip-sized amounts of alchohol on the Fingerprint sensor. I wanted to make sure the fingerprint sensor was neatly  dressed in the alchohol and allow the alchohol to dry there. 

 

Waited about 15 to 20 minutes and then powered the phone on. Set the fingerprint scanner to unlock the phone, and tested this 3 days before posting here. I no longer get random reboots. 

 

Issue fixed. 

 

If you try this yourself, make sure you use 99% alchohol. 70% has water mixed in which the sensor may clearly not like if the issue is really moisture getting in the sensor. 

 

I tried this after seeing another user in another forum claim that he used rice to fix his sensor rebooting issue. Rice works but it takes longer. 

 

Do this at your own risk. Good luck.

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