Old tried and true method :
Take one of the blown fuses apart enough to wire a 12v bulb to it, preferable a brake light bulb that requires a few amps to light.
Put this fuse in and you will see it light up when the amp is turned on.
Fiddle around with the amp from this point until you are somehow able to make the bulb dim a bit, at which point you have located the problem.

If you can't ever make the bulb go dimmer, then you will probably need to start searching the web for an amp.

NEVER MIND - I SEE BY YOUR OTHER POST THAT THE PROBLEM IS FIXED.
( would have been nice to post that here so I wouldn't have had to burn away any of the remaining brain cells I have left in answering this )