1AM: The ship shuttered, and a low thud came from the engine room, and then silence.
1:10AM: Another sputter, and a whir sound, and silence again.
1:25AM: The sound of feet running back and forth, the yelling of commands, but still nothing from the engines.
2AM: The lights go out. emergency power back-up comes on. The ship is now running on solar power only. There is enough power for emergency lights, life support, artificial gravity, and basic food prep. The ship is now adrift in space with still four days under full power, to get to Mars. Automatic S.O.S was sent. If all goes well, a ship will be able to get to them in four or five days.