iPhone 6s connector smoke when connected screen, now screen dont work

I replaced my iPhone 6s battery however when connecting the screen back to the phone I accidentally pressed the power button on and a the connector started smoking. Now the screen will not even show dead battery sign, what will have happened and will it be repairable?. I can answer the phone by swiping in the area, but can not see a thing. Cant back it up or anything as i need to trust the computer, which I can not do. any help will be appreciated.