@lalo479 , Lalo , the video link below will show where the wifi/bluetooth antenna is and how to replace if need be. Definitely try cleaning and reseating it first in case it is just a bad connection issue. Clean the contacts with a Qtip/soft cloth dampened with 90%+ Isopropyl Alcohol and reset, assemble and try.
Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
https://www.youtube.com/watch?v=azMo8g57dSU