Why is my keyboard not responding?

A new keyboard is $20-$50 from what I can find on eBay just quickly Googling your laptop.

Possible scenarios I have encountered in the past:

1. spill or other damage : the solution is to replace the keyboard here. Find the disassembly instructions probably here on iFixit. It should be simple.
2. battery swollen, pinching flat-flex cable : this is really more of a MacBook Pro issue but sometimes the built in lithium could swell causing the flat-flex cable to become disconnected. This could also happen due to some rough handling of the laptop or heavy handed typing flexing the keyboard itself.
   

The solution here would also be to attempt a disassembly, then carefully check the connections for the flat-flex cable leading to the keyboard.

Hope this helps!

If you put any more info on here I can probably help more.

Here are some links to disassembly videos. I can’t actually see a link on the Alienware iFixit page: https://www.google.ca/search?q=Alienware...