Chosen Solution
I have replaced the wireless/Bluetooth card in my laptop and the Bluetooth works but the wireless does not. Will replacing the display fix this or is it going to be the logic board that needs replaced? Update (01/06/2016) Dan, here are two pics of the card, one of the old one and one of the new one installed in the system. Unfortunately, the new one has no markings on the label:
Lets try a different direction here, download this app from the Apps Store: WiFi Explorer. With it you should be able to see the available Access Points (AP’s). Are you able to see any? Post a screenshot for us to see within your question (edit mode).
I would run disk utility to repair the drive and eliminate the chance it could be software. If you have already replaced the airport card the only option left would be the antennas which are in the display panel .
