after flash with z3x only restart why?

i need repair 4 file firmware

g7102

thanks



FLASH INSTRUCTIONS:
1. Choose correct flash file(s).
2. If you have PIT file chosen, then you must check 'Repartition' option.
3. Check flashing options if needed (Repartition, EFS clear, Boot update).
4. Power on the phone in download mode (turn off phone, hold Volume Down + Home + Power).
5. Connect the phone to PC with USB cable, install drivers if needed.
6. Press 'Flash' button.

Operation: Flash
Selected model: SM-G7102
Software version: 31.0

File analysis... OK
Total file size: 0x6F8BE2FC (1784 Mb)
Searching USB Flash interface... COM26 detected
Setup connection... OK
Reading PIT from phone... OK
Sending aboot.mbn... OK
Sending sbl1.mbn... OK
Sending rpm.mbn... OK
Sending tz.mbn... OK
Sending sdi.mbn... OK
Sending NON-HLOS.bin... OK
Sending boot.img... OK
Sending recovery.img... OK
Sending system.img.ext4... OK
Sending modem.bin... OK
Sending cache.img.ext4... OK
Sending hidden.img.ext4... OK
Flashing done (time - 00:04:10)

Done with Samsung Tool PRO v.31.0