Why wont my amp turn on?

I have a 1000 watt Kenwood KAC-7205 amplifer with 2 12" Memphis speakers, i hooked it up without the capaciter and it worked fine all day. but that same night on my way home it kept going off and on and now wil not come back on and the fuses are also fine. so we then hooked my amp back up with the capaciter but the amp still wont work, the capaciter works but still the amp wont work ???? Its really annoying smone please help and the amp is bridged and set on 4 ohm