My Broken Ice Maker

My GE Profile Fridge stopped working recently. The motor works just fine but it seems that there isn't any water moving through the tube on the back coming from the bottom of the filter. I replaced the water inlet valve but that didn't fix anything. What i need to find out is whether it is more likely that the electrical piece of the machine is not working or that the water portion of the refrigerator isn't working. And if it is the electrical how much will it cost to have a service man to come out and help as apposed to a water issue.