Wireless Network – Fix Wireless Network Not Showing on Ubuntu 14.04

I cannot connect to my wireless network. I have referred many stack overflow questions related to this and the one that I found closest, perhaps the exact was this one, the difference only being that problem started after I suspended my pc and then woke it up. I tried rebooting my pc, followed some steps in other Stack Overflow answers, but the problem still persists. It fails to show wlan0. However, I am able to connect to my network via ethernet. I have a Dell 5558 laptop running Ubuntu 14.04 pre-installed. Reading the comments in the above referenced link, is it an internal problem or can I rectify it using software? I can post any information if required. Please help. Thanks!