HP Compaq dx7300 MT Reference Manual page 125

7. Remove the SmartCover lock from the backwall of the chassis using the special security
wrench and disconnect its cable from the system board.
8. Disconnect the data and power cables from the system board.
9. Disconnect the "Serial A" cable from the system board, remove the two screws that secure
the serial connector to the backwall, then remove the serial connector.
10. Remove the fan shroud by lifting it up and out
11. Remove the chassis fan
Service Reference Guide, dx7300
Removal and Replacement Procedures— Slim Tower (ST) Chassis
(Section
(Section 7.18)
43361 1-001
(Section 7.2)
7.12).
7–19