11 removing the keyboard, 12 replacing the keyboard, 13 removing the palm-rest – Dell Inspiron 15 (3521, Late 2012) User Manual

Page 4: 14 replacing the palm-rest, 15 removing the wireless mini-card, 16 replacing the wireless mini-card, 17 removing the i/o board, 18 replacing the i/o board, 19 removing the system board, 20 replacing the system board