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So first, laying it on it's side could be a big problem but you won't know until you get the unit at least running again with fan operational and such. Laying it down on it's side can cause refrigeration oil to cause a restriction in the sealed system but you won't know until you get the refrigerator running.
Now you said that nothing is working so this is a different issue. The unit could just be in defrost mode so give the unit an hour and if it doesn't kick on with fans and such, check the wire connections through the top freezer door hinge as well as to the main control board on the back of the refrigerator behind the 8" x 10" sheet metal panel. If you find nothing loose or wrong, your main control control board just needs to be replaced. Sometimes just jostling the board from movement or transportation can cause it to fail. Below is a link to the control board you'd need to order for your model.
CLICK HERE for control board
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Alright, well if it still doesn't turn on, somehow the board failed when transporting it so the board would just need to be replaced. Good luck!