Dell Inspiron 1721 (Mid 2007) - Manual (Page 145)

Adding and Replacing Parts
145
Replacing the Keyboard
1 Hook the tabs and the keyboard connector along the front edge of the
keyboard into the palmrest, and place the notch on the top of the keyboard
on the tab on the base of the computer.
2 Keeping the keyboard flat against the computer base, slide the tabs on the
bottom of the keyboard under the palmrest, and ensure the tab on the
computer base slides into the notch on the top of the keyboard.
1 keyboard 2 screws (4)
3 notch on keyboard 4 tab on computer base
2
1
4
3