'''Sounds to me like you broke the connector,''' specifically the cam lock. You may have pulled the ribbon out without unlocking, that could have damaged the end of the ribbon cable… ''perhaps leaving some insulation stripped off inside the connector.'' You might be able to puff the insulation out with a blast of air - otherwise a professional replacement of the connector (logic board soldering requires special tools, solder, and lots & lots of practice) OR, logic board replacement.