Amp stopped working

[whiterice]

I have a rockford fosgate punch amp thats 75x4 that just stopped working, hooked up my buddys amp in my car, it worked, hooked mine up in his car, didnt work. theres NO fuse on the amp?? i dont know what to do??

heres some pics, dont know if these help.

http://i2.tinypic.com/qp5e2v.jpg

http://i2.tinypic.com/qp5n5v.jpg

Thanks

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[Pyro_By_Nature 5,000+ posts]

Does the protection light come on?

IIRC the RF amps have either an internal fuse only or no fusing at all.