Razer Blade Stealth 12.5' (2016) wifi not working

TLDR: looking for model of replacement wifi card, and the specs of the screws that hold the outer case together on a Razer Blade Stealth 12.5' (2016) Hi, A couple years ago now my laptop stopped being able to connect to the internet, I tried fixing it by uninstalling then reinstalling the wifi drivers and a host of other things that i don't quite remember anymore, but eventually put it in the "too hard basket" and left it. Found the laptop again yesterday and thought id take another run at it. Tried reinstalling the killer wireless drivers this morning, but it came up with a message "you must have proper killer hardware installed in order to install Killer performance suite". So thats brought me to the conclusion that the card is either fried, or dislodged or something hardware related. Assuming theres not something im missing (please tell me if there is) So, what im hoping to find out is: A) what wireless should i buy in the case that its fried and not just out of place or something and B) what are the screws on the outside of the cases specifications? there are a couple that fell out over the years and i'd like to replace them when i get in there to fix the problem. Cheers, Hugh