Dell Inspiron 15 (3542, Early 2014) - Manual (Page 31)

3 Carefully turn the keyboard over and place it on the palm rest.
1 plastic scribe 2 keyboard
3 tabs (6)
4 Lift the connector latches and disconnect the keyboard cable and
keyboard-backlight cable (optional) from the system board.
NOTE: Keyboard-backlight cable is present only on a backlit-
keyboard.
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