Lutron Electronics Desktop Applications Software Engineer interview questions

You are a new hire of the product support team and today is the first day. Your mentor is busy with a meeting and leaves the office immediately after he leads you to the office (without introduction). While he wants you to solve the problem of a few discolored dimmers quality issue complained by a distributor in Atalanta. What should you do? Follow-up question: what are the things you've done that you think should be improved just now?