If this has happened to you and now the thing appears to not be working correctly then have no fear.
It’s likely that the internal mini pci wireless card has jumped out of it socket.
Prise off the plastic front bezel and then remove the 2 screws from the back.
You can now remove the cover revealing the mini pci card probably slightly out of its socket.
Undo the 2 screw that retain the metal shield and reseat the card before re-attaching the cover.
Reassembly is the reverse.