Do I need to replace my internal microphone? If so, how?

Before my internal microphone went bust, it was smooth and nice, but since a few months ago, it randomly died on me and when I was testing my microphone with skype testing, it came back as unresponsive, but it also replayed a full static microphone. I've researched problems from static to enabling it back but they didn't work. I don't know what's causing the problem, if there's a malfunction in my microphone, or what, but how can you fix this problem? Thank you.