G925f repeir EFS, IMEI and fingerprint scanner

Hello. After Reset EFS, IMEI change and the CERT, stopped working a fingerprint sensor, and can not set a PIN code, password and unlock (they give an error).
These security features are available if you make a Reset EFS. But it stops working connection is lost IMEI and S / N. EFS recovery and CERT again lead to the conclusion of the system security features.
Please help restore full phone operation.