Sentence 1: Tim didn't know why his new speakers didn't work. 
 Sentence 3: Eventually he called to have someone come check 
 Sentence 4:  It turns out he never plugged them in 
 Sentence 5:  He thought they were wireless 
 Option 1: He figured out why they didn't work and fixed them. 
 Option 2: He tried everything to find a solution.