Check to see that the Wurlitzer 1015 is on a floor that is flat and level. Use your level to ascertain the location is even all the way around the jukebox.
Follow the electric wire and make sure that the plug is inserted into a working electrical outlet. Look for any fraying or worn spots on the wire covering, and repair these using electrical tape.
Locate the black vertical rod called the reject rod that runs down the right-hand side of the jukebox. Release the latch that holds the door closed, and follow the reject rod into the jukebox.
Find the dime-sized brass plate called the rocker plate located on the inside of the door. The reject bar will lead to the brass fitting that should not be touching the rocker plate, but resting above it. If the brass fitting is touching the rocker plate, unscrew the fitting and move it up slightly so that the rocker plate and brass fitting are not touching. You may need to do this once or twice to get the right space between the two parts.
Check for signs of dirt or pieces that might need oiling. Use only oil that is meant for Wurlitzer parts. Use just a drop of oil, and wipe any excess off with a microfiber cloth so as not to leave lint on any of the internal pieces.