Dell SmartStep 200N Replacement Manual page 12

Modem to system board:
(2 each)
12 Before Yo u Remove or Install Pa rts
NOTICE: When reinstalling a screw, you must use a screw of the correct
diameter and length. Ensure that the screw is properly aligned with its
corresponding hole, and avoid overtightening.
Hard drive:
(4 each)
Keyboard
(3 each)