Wifi hardware not detected. (already replaced airport drive.)

So I'm trying to fix my friends computer. She spilled a ton of coffee on it. And lucky enough the only thing wrong was the wifi hardware not being detected. I replaced the airport drive (not knowing the amount of dried coffee on the other side of the logic board.) So I took it apart and was taken aback at the sheer amount of dry coffee everywhere. I set to it with rubbing alcohol and a toothbrush and got the logic board spotless. Its still not detecting the wifi hardware. What should be my next step? Looking at wiring? Or replacing the logic board?