What would cause my 1996 Isuzu Rodeo LS 6 cylinder to have no power the battery

all connections clean and tight,no missing or corroded grounds?move the wires around the battery area,possible short or corroded inside of wires.check voltage to starter,and see if you have got voltage there.

Make sure battery cables are not reversed (battery in backwards) If that's ok, suspect open ignition switch circuit. Should have been able to roll start it!!