LG refrigerator compressor won't start

Yesterday I received an overnight shipment of the overload protect (p/n (http://www.appliancepartspros.com/lg-overload-protect-eaf44336501-ap5108813.html"]EAF44336501 (AP5108813)[/URL]) and capacitor (0CZZJB2014G (AP4591436)[COLOR=#555555][FONT=&quot] for this refrigerator, thinking they were the problem, because the overload protect had a rattle inside when I shook it.
However, the new overload protect also rattles inside, and the replaced parts did not fix the problem. Should the overload protect rattle inside when shaken, or do I have a different problem (compressor)?
How can I test the overload protect, and how can I test the compressor wiring?
thanks
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