NS7II will not connect to new laptop

What are some basic troubleshooting steps when hardware fails to connect to Serato DJ on laptop?

Long story: Everything was working. Recent move. NS7II went into storage. Upgraded old laptop to Sierra (bad move). Found out I could no longer get NS7II to connect to old updated laptop. Decided to by new Mac with older El Capitan 10.11.6, reload Numark drivers and updated Serato 1.9.4. Still can't get them to connect. Could be a hardware issue from the transport/storage but I'm hoping it's an easy connection/setup issue.
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