siri and video camera not working after screen replacement

Okay so I have done a few iPhone 7 screen repairs with success (with iOS 11 software). This is my first iPhone 7 Plus with the iOS 11.2.1. I did my normal routine screen repair, started back up and as I tested all the functions of the phone Now Siri cannot hear me and whenever I go to do a video the phone freezes and restarts. I have a hard time believing there has been damage to the cables. I can take pictures with both front and rear camera, I can do voice memos, but I cannot do dictation within text messages. So some random features seem to no longer work after this screen replacement. Tonight I will be attempting to put the original screen back on to ensure its not a damaged part. I have done a reset and a complete restore. deleted everything back to its factory settings as this phone is going up for sale (once its fixed up). Any suggestions?? Help!!