wont start

My brother has a 89 cavalier , he started it up one night and backed up about 2 feet, it shut-off for no reason, he went to start, and there is now now power to anything, interiro lights wont come on nuthing, and his car will not even turn over , there is no attempt of it trying to start, when he turns the key there is no sound or anything coming from engine bay. We threw in a new batterry and still same thing happens. if anyone has help please respond immediatly!!!

Altenator maybe??

timing chain?...has nothing to do with lights, nevermind, lol. Alternator?

check your battery positive cable. it might have fractured internally or it rubbed against a ground. also check your ground cable and make sure it is also not fractured internally or loose at the engine mount.