I had a customer's Inspiron 15 3537 laptop in my possession last week with a wireless adapter and LAN adapter issue the wired LAN was not appearing in device manager and the wireless had an exclamation mark next to it.
I downloaded from the Dell site all the latest drivers as I noticed there was an issue with the USB and Graphics as well.
I have fixed them (USB & Graphics) but attempting to install the only LAN driver available on the Dell website I get the message that the "Lan adapter is not present and cannot install...
I was however able to reinstall the wireless driver as it had an issue saying the airplane driver was not installed (bit weird)
With the wireless driver reinstalled and picking up that the driver is present and correct but not being able to see any available networks it was saying that it was now available but not turned on, which everytime I used the "F" key to do so it would only turn airplane mode on & off!!! there is no hard wireless switch on the laptop.
For now I have the customer working off a thumb size wireless adapter stuck in a usb port but at least it works but would like to resolve if possible... I can order a onboard wireless adapter replacement and try that I guess, but wondering if the real issue maybe the MOBO?
any suggestions appreciated thanks in advance..