Crius
Is there a cal or z-zero process like nick suggest? I wouldn't think it would do check prints if something is out of alignment but who knows. Also can you check that the USB port is properly connected to motherboard? I wouldn't think it could be disconnected - but it sounds like its not seeing/recognizing your file or usb stick. Its the correct file format (.STL) correct? Does it need to be run through a slicer program first? Can you save the file type to a different format (in CURA, or simplify3D) and get it to work? Hopefully Creality have support for it!
Just guessing on these.
Hope you get it going soon,
B