A:Answer Hi Nadine, here's the step to reset your unit. Reset step is also available in the manual page 7. Please check the next link below. Thanks! ~Erin
https://docs.sony.com/release//MEXN5100BT_N4100BT.pdf
https://us.en.kb.sony.com/app/answers/detail/a_id/40066/p/37865,38218,69554,95351/c/65,66/kw/how%20to%20reset