Dell OptiPlex XE3 Small Form Factor Service Manual page 53

7. To remove the screws from the system board:
a. Remove the screws (5) 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].
Демонтаж і повторний монтаж 53