This laptop was released in September of 2010, Identified by model number Inspiron N5030 or Inspiron 15. It is an all black laptop with a DELL logo in the center of the top cover, a mouse pad with separated left and right key buttons, and a disc drive on the right hand side of the computer.
Rodrigo Perez, here is a decent video that will show you how to replace your keyboard. I also suggest that you download the service manual from here. the manual will tell you exactly what to do . Hope this helps, good luck.