Not sure if my response worked, so I apologize if this is a double post. I took the recorder into B&H yesterday and they determined the line-in wasn’t working properly. They gave me a new one and now everything works fine.
Thanks so much for your response- I’m doing the wedding as a favor for a family friend (unpaid), they’re aware of the extent of my experience in this stuff. Figured I should have better sound equipment anyways so I made the investment.
Thanks again!