Dell Inspiron 9400 - Manual (Page 50)

18. Remove the processor thermal-cooling assembly (see Removing the Processor Thermal-Cooling Assembly ).
19. Remove the processor (see Removing the Processor Module ).
20. Remove the four M2.5 x 5-mm screws from the system board.
21. Remove the system board, slowly easing the connectors out of their access holes on the back and side of the computer base:
a. With the back of the computer facing you, grasp the upper-right corner of the system board and lift it slightly.
b. Pull the system board assembly away from you toward the front of the computer and slightly to the right; at the same time, use your left hand to
release the audio connectors by pulling the side of the computer base slightly to the left.
Replacing the System Board
1 system board M2.5 x 5-mm screws (4)
1 system board assembly