Dell Inspirom 530 - WiFi card won't turn on.

About 2 days ago, I had turned my computer on and I hadn't been on it in a week or 2 because for some reason my computers WiFi connector was not turning on in the back. Usually, if the wifi is turned on, there is a green light flashing in the back which tells me it is picking up or searching for a signal. And once I turned it on, it had started working again. So I played on it a bit and got off. But when I went to turn it on today, it wont pick up any signals. My router is working perfectly fine since I'm typing this on my iPad. Assistance would be greatly appreciated, thanks!