I had an issue before with power which seemed to be fixed with a new battery and cables. The problem was that my car wouldn't start and the power would just die. It was very similar this time except the car didn't even attempt to start. The power just immediately disappeared.

I tried cleaning up the battery connection to the frame and sanding everything there to get a new connection, but nothing is working now. There is still power though because if I hold down the lock button on the door a beeping sound comes from the middle of the dash. Also, if I put on the e-lights I get a whirring sound. Any ideas?