jio set top box issue

Messages
182
Location
Ranchi
ISP
BSNL
when i open any channels for show in jio set top box it just appears to be cropped like in zee5 shows its not full screen on my tv.cant i see it in zoom not in cropped?

whenever i open set top box my tv doesnt show clear picture for 2-3 sec and then automaticaally adjusts...i have tried to go to settings and adjusted resolution for set top box but it just keeps on giving unclear picture for some seconds and runs fine.sometimes a black screen also appears and then it runs fine..i guess my hdmi port is not working..what should i do?any suggestions?