Audio Systems: car stereo not working, power amp, bose system

Question
purchased a 2004 Nissan Maxium.  And on the stereo screen everything of the system is working, but nothing is coming through the speakers.  I heard where you can reset the amp, but can't find a reset button, can you tell in where it would be.  Amp 28060 7y300 amp set xx.  Thank You

Answer
Nice car.  I  like the Maxima very much!

This looks like a Bose system. Is it?  If so, Bose is a non-conformist manufacture and their product design is non-compatible with other manufacturers interface without some design effort.

In some cases, with Nissan, the actual power amp is mounted on the basket of the speakers; don't know if this is the case with your system or not.  If this is the case and all speakers are quiet then the problem is not the speaker amps but the distribution node. Could be a fuse or could be a cable became unplugged or something like that.

But, if there is a central power amp the feeds each of the speakers the best way to reset it would be to lift the power wires such that there is no power for 15 to 20 minutes.  Doing so should reset the protection circuit and get it going again.

Take it that far and let me know what is next.