Alpine Amp stopped working :(

My Alpine amp stopped working while i was driving. System was on full tilt, like usual, but it just decided to stop working //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

1) All fuses are perfect.

2) The input voltage at the amplifier was measured at 12.4v with car off

3) RCA cables are good.

4) Amplifier grounds are good. (Other amp's ground is hooked up to same spot, so its good (sanded down to metal and bolted down really good on chassis))

5) Output voltage to subwoofer is 0v //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

Gains were also set properly, and my IDQ was receiving 400w.

What could be the problem?

If it is fried...what components would i need to check inside the amplifier? Here is a picture:



Thank you for helping, if it is an ir-replacable component inside of the amplifier I would like to know of a better amp suited to push my IDQv3D4 @ ~400 watts and not poop out //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif