Answering for a teammate, Shaina! The next thing you will need to do is disconnect the connectors and clean them with like a 91% alcohol, then try it again, if this doesn't fix your problem, then you may have a bigger issues. Like minor logic board damage in the connectors area, which can happen if the phone was ever dropped. Inspect the connectors for any micro fractures or blown resistors and diodes, you will need a microscope or Superman's vision. If you fine and of this, then lets hope you are a micro soldering specialist.
If this helps please accept and mark me up, Good Luck!