Why did my amp just crash and burn ?

 I have a 2010 YBA YA201 amp. It has been a reliable versatile amp for quite some time. Even using it to route my cablebox through to TV. It has gotten plenty of use over the years. Nothing was playing through speakers at time of burn out if we can call it that. In fact just installing the cables for the very first time. The hissing sound from the speakers was the first sign something was just not right. Checked and saw the L and R cables were installed to the correct posts on the amp. Within a minute the amp just switches off and is now lifeless. 

How do I check fuses in amp , can it be completed by newbies like myself. If I find fuse is blown, are they generic and fit all brands ? If repairable, what are chances the same situation can happen again ?.

If amp , as you mentioned , could be in protection mode, how to unprotect ?

Is the amp repairable at all given all the details provide above?

It sounds like a fuse. It’s strange that the fuse can’t be accessed from the back of the amp, but it’s French, and foreign stuff can be a little idiosyncratic. Unplug it, open it up and have a look. That's a nice amplifier.

Correct . It is quite a nice amplifier. I have held onto it for quite some time as the aesthetics and overall musicality certainly merit the great reviews it received upon release. What I am planning to do is review some videos on Youtube on how to determine if a fuse is blown & the methods employed to replace it. As somebody with limited knowledge in this area, are fuses pretty generic for all amplifiers in general, similar to replacing say a household fuse perhaps ?. One other thing is even though the connectors from the amp to the speakers were assigned correctly, with Left running to the L connector on the amp and ditto for the Right to R connector on the amp. Would the fact I designated the Left speaker of the system , facing me as Right , as the Left channel in this case and vice versa for the Right channel have anything to do with it?. if this indeed caused the problem, I will have to redress when the amp gets repaired. By the way keep the info flowing as you have been really helpful with your input. 

Sounds like you inadvertently shorted the spades across the speaker terminals.

That said, not too sure why you'd want to connect it the way you said you did. Weird, for sure.

Looking at pictures of the amp the fuse is in a tiny drawer just above the connector for the power cord.  The drawers are sometimes stiff to pull out but that is by design.  Also occasionally they contain a spare fuse.