Im having the same exact problem my amp i just got off amazon is a boss audio 5000w and it is turning on fine as well with my deck but the only thing playing the music is the regular speakers so i went threw everything and the only thing ive come up with is that the RCA outputs are not reading 12v like they should and yes my car was running when i tested this and i would have to take this deck completely apart to see the connections behind and dont know if i would even be able to put it back together, so should i assume that is what is wrong ? The decks red and white RCA plugins are shot , and get i new deck and sell this one because it works for everything but getting the music back to the amp witch someone wanting just a deck wouldnt need ? Im probably going to pull it apart and look at the connection ill post back to see if i got the solution.