Screen goes blank but finger print works solve this issue
Try to force restart your mobile by pressing power btn + volume up & down button simultaneously.Serach on google how force restart nokia 5.1 plus.
If you are successful, try to update your phone,if you have already done it,Reset the phone through setting after taking the back up and after the reset is over, start using phone without making any changes in setting regarding display.
This was the only solution worked for me, waiting for the fix from Nokia team.
If any issues, reply to this thread. Will help you out.
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