Hi my product number is QP788AA#ABA model 320-1030, my wifi suddenly stopped working and when I trouble shoot it, it says connect Ethernet cable. I have never used the Ethernet cable, only wifi. It will not find the wifi and it will not let me manually add a wireless connection. I tried to make it find a device, it does not work. That option is not even on there. I have XFINITY wifi if that help. I have tried everything. I already tried the device mananger and reinstalled the network adapter, I Factory restored my computer. Nothing works. Please help.