Thats a bunch of BS!!!!! Why give a warranty if you dont have another in stock to replace??Maybe they are the kind to repair instead/with low grade parts???Try a quick test ..Take the amplifier to the car Batt, and hook up ground to ground, and poss with Remote, to poss batt terminal,replace the amp fuse anyway,sometimes you cannot see a bad fuse,should light rt up,Amp may be good, you have an issue with your wiring.If it does not light up, then there is deff an Issue with that amp..point blank.You can use 12 ga speaker wire to test with..your only testing for power supply nothing more..Yet usually works for me every time.