Alpine CDA-7892 Head Unit, worked fine but now no sound. Help!!

[Jerry Gerner 2]

I have had this Alpine CDA-7892 Head Unit for 3 years now. I haven't used it in 2 years. I went to hook it up today cause I planned on selling it but there's no sound coming out. I know the speakers/wires and all connections are good because I also hooked up the other three Head Units to my show truck and all work. Not sure what the hell is wrong with it. Any help would be great. Thanks

:angry::blink::unsure:

 

[Clay Campbell]

Its possible that you have the on board amp switched off. When you have it installed earlier did you use an external amp?

 

[Jerry Gerner 2]

No, no externernal amps just the speker wires for the front doors. I tried both front and rear wires from the H.U.. I did see on the instruction manual something about the interrupt feature, and a bunch of other stuff that could be causing this problem. I'll figure it out when I have some spare time, like I said it's an extra head Unit that I have laying around and don't need right this minute.

 

[Clay Campbell]

My guess is you have a setting somewhere that is muting the sound from the H.U. I have rewired my whole system before because of this only to find out that I had the internal amp switched off. Talk about frustrating. One time I spent two days doing a whole system install in a friends jeep. After I got it all done we tried to crank it and not a single electronic thing worked, wouldn't start or anything. After freaking out for a while we found out that you have to put the key in the drivers door and lock and unlock it manual a certain number of times and it will reset the system. Everything worked perfectly after that.

 

[Jerry Gerner 2]

:lol: I'll figure it out, thanks.