so my family member gave me his z2 that apparently had something wrong a while ago...when i tried to turn it on this weekend since my old radio gave out, the screen is black and the buttons dont turn on, but i do hear the fan in the back turning on...The way i tested the radio was i connected the RED power wire and the ACC yellow wire to a positive terminal on a battery and the GROUND black wire to the negative of the batter, could this be what its causing it not to turn on that im missing another cable to connect? or what can i test out to see if it can be fixed
and i have reserached but
