Chosen Solution
Did you try running the onboard diagnostics to see if an error popped up? Restart your system and press the D key. Let us know if you got any errors. I wish you had made note on the errors you had gotten before. Do make an effort to document what you got. Reference: Mac startup key combinations If you didn’t get any errors, you’ll need to see what the WiFi menu offers for information. Click on the WiFi menu icon while pressing the Option key to gain access to the advanced diagnostics. Take a snapshot of the light grey area so we can see what your radio is doing. You might want to get from the Apps store a better graphical view using this app WiFi Explorer. It will also allow you to see all of the AP’s near you which might be conflicting with yours.
