Sasa LaRue

I have a kenwood 8405 4 channel amp powering my 4 door speakers and the other day in the middle of a song they decided to shutoff. I turned on and off the radio and the amp resumed working a couple days later the same thing happened but the amp will not turn on now. All wires i checked and swapped out with my kenwood 7205 which is working and they work so i know it isnt the wiring. I noticed that when i have a hot power and disconnect it from the amp while still on it will light up as if its working then power down because there is no power connected anymore. It would seem that the amp is fried or something else is wrong internally anyone else have this problem??