If your laptop's Wi-Fi is no longer working, then you might have to replace it. It is something you can totally do it yourself instead of taking it to a technician provided you get the right replacement part. But before you jump on it make sure that it is really faulty. In this post, we shall see some basic checks to see if the Wi-Fi card is faulty. A short demo video is also included on how to replace the Wi-Fi card on laptop.
Computer DIY : Replacing Faulty Wi Fi Card on Laptop