Hello all, I connected up my 6x9s from my stealth shelf to my headunit the other day and I was driving along with ma music on pretty loud, everything working fine then it cut out no sound no power going to it not even turnin on. I've not blown the speakers, and I thought I'd cracked it when I found the fuse had gone, but I replaced that and it still doesnt work

I even tried connecting up my old headunit, and that doesnt work either. I tried the factory VW radio, and this is the only one that shows some sign of life, it turns on and asks for the security code but I dont no what it is.
Any1 got any suggestions on what is wrong with it?????
Would be much appreciated, its doin ma head with out music lol.
Cheers, tim