The question is as the title says. I just installed my optical drive back into it's place, and a few cables got loose (namely the audio and "display" cables). I plugged them back in and switched on the Mac, but it said wifi hardware not detected. Normally one would assume it's a problem with the display cable (which is the cable for Bluetooth, the camera and wifi), but Bluetooth is working perfectly, the camera is functioning, but the wifi icon on the task bar still says the same thing. I ran a system report and refreshed it, and surprisingly the wifi card was being detected there! I reset PRAM and the SMC to no avail. What's going on?