Dell Optiplex 7070 Small Form Factor Service Manual page 63

7 To remove the screws from the system board:
a Remove the 5 screws that secure the system board to the chassis [1].
b Remove the single screw used as a mounting point for M.2 SSD drive [2] and the standoff single (#6-32) screw [3] that secures
the system board to the system [3].
Removing and installing components 63