S6 G920P after repair network keeps restarting

s6 g920p sprint problem it no service
I try repair network by octopus box
then the device keeps restart after 2 min.
I flash it rom
then become restart on samsung logo
I fash it with all flash files
roms 5.1.1 one file and 4 files
roms 6.0.1 one file and 4 files
efs file
modems files
but still restart
and finally I flash it with combination rom
after factory binary screen give me this image

any solution please ?