Dell Vostro 3555 (Mid 2011) - Manual (Page 37)

8. If your computer comes with a backlit keyboard, disconnect the keyboard
backlight cable.
Installing The Keyboard
1. Connect the keyboard data cable to the back of the keyboard.
2. Replace the adhesive tape to secure the keyboard data cable on the back
of the keyboard.
3. Connect the keyboard data cable to the system board.
4. If your computer comes with a backlit keyboard, connect the keyboard
backlight cable.
5. Install the battery .
6. Follow the procedures in After Working Inside Your Computer .
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