1990 Buick Century

Girlfriend was driving down the road and everything shut down. No internal light, no headlights, car will turn over but wont start. When you try to start the car then turn the key in the off position and pull the keys out of the car the red temp, oil and batt lights stay on for a few seconds. And sometimes the coil pack starts humming after trying to start the engine and turn the key in the off position it has a new batt, and an alternator that is 1 year old.