Dell Alienware x16 R2 Owner's Manual page 88

Steps
1. Remove the two screws (M2x2.5) that secure the display-cable bracket to the system board and palm-rest and keyboard
assembly.
2. Remove the display-cable bracket off the system board and palm-rest and keyboard assembly.
3. Open the latch and disconnect the microSD-card reader cable from the system board.
4. Peel the tape that secures the I/O-board cable to the system board.
5. Open the latch and disconnect the I/O-board cable from the system board.
6. Disconnect the left-fan cable from the system board.
7. Open the latch and disconnect the power-button cable from the system board.
8. Peel the tape that secures the headset port cable to the system board.
9. Open the latch and disconnect the headset port cable from the system board and remove it from the routing guides on the fan
and heat-sink assembly.
10. Disconnect the speaker cable from the system board.
11. Open the latch and disconnect the keyboard-controller board cable from the system board.
12. Remove the power-adapter port cable from the palm-rest and keyboard assembly and peel the power-adapter port cable off the
fan and heat-sink assembly.
13. Disconnect the right-fan cable from the system board.
14. Remove the seven screws (M2x4) that secure the system-board assembly to the palm-rest and keyboard assembly.
15. Grab the system-board assembly from the upper left and right side of the heat sink and lift the system-board assembly off the
palm-rest and keyboard assembly.
16. Place the system-board assembly on a clean and flat surface.
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