Complete Computer Failure

Hello to the entire community!
To explain briefly the situation .. A few days ago, the PC of my girlfriend was released.
It was lit, normal. Then without even prevent, he died suddenly. Since then, impossible to turn. It does not turn at all, no noise, nothing.
The computer a few years now, with Windows XP.
Age does not justify much, do you know what could come this .. Problem?
It's very annoying because they need it especially for college ..

It would be great if someone could enlighten me on that ..
Thank you very much for your answers (if there will be answers ).
If you need more information do not hesitate to ask.

It may be your diet if you really have no lights on your motherboard.
Or your motherboard, which is much more rare. Look at your motherboard if it is in good condition

Ok, that's what I thought at first ..
Can we use the power of any other computer? Is not it risky if not the same characteristics?

if you do not have a big graphics card you should have no problems. Otherwise you will need a son with food for the outgoing CG.

Remove everything that is not necessary if your food is lower

Ok
I think my food 'should go, I do not have a computer too powerful or too low ..
As I am not too familiar with the assembly-disassembly in PCs, it is difficult to dismantle a food? And is it connected to many things?
(I think it must be the motherboard, but after I do not know too ..)
I do not think it was a big CG, so it should go in terms of turnout.

Are there risks to my PC If I remove my food