how can i fix my kenwood amplifier?

i have a kac-8152D amp and it dont work no more.i put it the fuse and it spark in the beginning but dont work.when i take the fuse out my light turns on for 5 seconds then turns off.

Open it up, look for smoke leaks.
Odds on the main output devices have blown up.
Re-design7 years ago
Send it back to Kenwood.  You'll not have much luck finding the problem unless you know a little about what you're doing.

You need to start with a schematic for the unit and work on the problem from there.

Do like Steve said and open it up to see if anything is noticeably burned or melted.