HP Compaq dx6100 MT Reference Manual page 171

8. Disconnect the "Serial A" cable 1 from the system board, remove the two screws 2 that
secure the serial connector to the backwall, then remove the serial connector 3 from the
backwall.
9. Remove the fan shroud from the fan
10. Remove the long mounting screw that secures the system board tray to the chassis.
Service Reference Guide, dx6100
Removal and Replacement Procedures— Slim Tower (ST) Chassis
(Section 7.12, "Fan Shroud").
361293-003 7–53