2002 Chevy Blazer wont start

Okay so I have a 2002 Chevy Blazer wont start now
I was sitting in it with in the AC was on and it's the
AC started making a funny rattling noise I shut the
motor off in the noise still kept going and now it
won't start I'll put my key in the ignition and turned
on AC mode the dash lights come on the radio
comes on the headlights come on and then when
you try to turn it over everything goes blank the
starter don't click or nothing I try to hook a jump
box to the battery still does the same thing just
goes blank Clueless