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i have two 12inch audiobahn subs and a 4000 watt lanzer vibe amp. anyways when i turn my system on my power light comes on for a couple of seconds then the power light fades off i checked all my fuses they are all good checked my connections they seem to be fine. so me and my uncle hooked one of his old amps up to my subs and it didn't work could i be possible that i blew my subs or what could be the problem?!?!?!?!?!?

First, try not having any subs hooked up to it. If it still doesn't power up, then you've got a power or ground cable problem (unless the amp is physically damaged). First thing I'd check is all your cabling, most especially your grounding point.
If it was a fuse problem, your amp would more than likely not even light up.

ok i will try that thanks