thank you so much this worked for me too!
for the record, i had a gateway fx p-7805u which is similar to the 7811fx
i replaced the wifi card thinking it was faulty, but it was not! the switch was faulty.
i had a pci express micro card, which looks different from all other photos in this thread, but i just followed the same steps and covered the 2nd visible pin laying the card down with pins on the bottom like this:
the asterisk marks the position of the tape.
its a miracle. now i dont have to use my laptop with a bulky usb wifi attached to the side!
another note, the Function + F2 does not shut off the wifi