you turn off your chromebook and press ctrl+esc+refresh+power button than ctrl+d than enter than ctrl+d then you have to take out the write protect screw near the HDMI port you have to open the chrome book though it will reboot factory reset.
You should replace the wifi card with any other card that fits if you get the keyboard out you'll see the wifi card just get a regular wifi card I put a Mac one in there so anything should work