Lights come on, not cooling, temp indicator shows (-)

Because your digital controls appear to be confused I think the electronic module behind the temp control is defective. The part number for your control board is 12868513
You can enter the model number JFC2087HRP in model and parts search feature at the link below. You may want to unplug refrigerator and examine the part for burn marks or other signs of damage. Let me know what you find, Thanks Sea Breeze

http://servicepartstec.blogspot.com/