Removing the keyboard is a useful way to clean it, or it can be replaced if broken.
The keyboard needs to be removed if you wish to remove the top part of the case for further maintenance of the computer.
First, the screws on the bottom need to be removed first.
There are 4 small tabs holding the keyboard in place. These are located above the F1, F5, F10, and Ins keys. pic 69
Starting on one side, use a finger or small tool to press the tab into the chassis of the computer. The edge of the keyboard will elevate. 72, 73
Continue down the keyboard. The keyboard will be noticeably elevated. 82, 83
Once all of the tabs are indented, the keyboard will eject itself, remaining elevated. 388
Partially remove the keyboard by sliding the elevated keyboard towards the screen. Don't remove it all of the way, as we need to remove it's cable first. 389
To remove the cable holding the keyboard in, flip the keyboard upside down. 391 Using your forefinger and thumb, pinch both sides of the cable and pull away from the connector. 396, 401
You now have the keyboard separated from the computer. If you wish to clean it, you can use compressed air to blow the dirt out.