Hello guys i just registered to post this problem i got over with.
So my problem was Xperia Z constantly restarting it self. So i flashed new firmware, stock firmware locked and relocked bootloader..
Nothing helped. I even get worst, my phone started restarting at bootloader sequence. I was like literary puling my hair of head.
I tought since i droped my phone and replaced display that actualy that drop damaged something on motherboard.. but no
I tried with puting just new batery and all problems were solved
Phone didnt restarted even once, i flashed lineage firmware and is working like a charm 
I hope that this will help someone ^^
Sorry if i am posting in bad forum section and sorry for bad english, have a good day ^^
So my problem was Xperia Z constantly restarting it self. So i flashed new firmware, stock firmware locked and relocked bootloader..
Nothing helped. I even get worst, my phone started restarting at bootloader sequence. I was like literary puling my hair of head.
I tought since i droped my phone and replaced display that actualy that drop damaged something on motherboard.. but no
I tried with puting just new batery and all problems were solved
I hope that this will help someone ^^
Sorry if i am posting in bad forum section and sorry for bad english, have a good day ^^