How to add os in my htc one m7?????

[patel 1208_shiv]

my htc one m7 is not working because on os in my phone and i have os but my mobile not connect to usb cable.. so How to add os in my htc one m7?????

 

[B. Diddy]

Welcome to Android Central! Can you clarify your question? Are you saying that the phone is reporting that there is no OS? Does it only boot to the HBOOT screen? Is it rooted?