I’ve been having troubles staying connected to the internet due to at random points the computer disconnects and doesn’t reconnect. I checked my drivers during one of these incidents and noticed my network driver was missing. I’ve tried network resets and they haven’t worked. Wifi diagnostics tells me that the wifi is off and to turn it on (and when I try to turn it on it just spins forever). On certain occasions it will tell me (on boot up) that your Network Adaptor can’t be tested and to just restart.
If installing the ethernet drivers don’t work, you might have to replace that chip.