Well, in addition to all the fine suggestions that are here, I would like to add the simple and easy things that may have happened during the move.
IF YOU ARE NOT GETTING A LOUD POP WHEN THE MACHINE IS POWERED ON.......
1) Make sure that the wires on the terminals below are still connected to the screws. There is one ground and one each for left and right. The lower the tap the lower the (max) volume of the jukebox.If they are not connected there will be no sound.
There is a jumpers on the terminal strip where the volume control connects. Make sure that these connections are correct and tight. Also make sure that the jumpers did not fall off.
If you are getting the loud pop in the speakers when the power is turned on .....
Check the plug on the side of the mechanism, just below the back of the tone are.(looks like a little tube socket) Check to see that it is connected to the mech and the CORRECT PLACE on the amplifier. It mat be possible to have this end in the wrong place.
Check all all your connections against the pic.
I hope this was helpful.