What exactly do you mean by "shut off before all the 45's were rejected" ? The mech only load one record at a time, either from the left or right side of the carousel. If the power was shut off before a record unloaded from the turntable, you can manually return the mech to the start position. Do this by getting in to the back of the juke. on the upper right, near the top of the deck, there is a motor. There should be a little white gear coming from the bottom of it. I am assuming if you look in the middle of the mech, you will see a cam with a lobe on one side of it. Turning the white gear will advance the mech adn turn the cam counter clockwise. As the lobe on the cam nears the front of the mech, the record lifting arms should pull down clear of the carousel and return the record to the carousel. Stop turning the gear when the lobe of the cam has driven the lifting arms downward. Inspect your pin bank and push down any "popped" pins. This will prevent the juke from trying to start when you turn it back on.

Hope this helps