HP P Class 450/500/550/600/650/700/750 Reference Manual page 24

System Overview
Reversing the System Fan for the P600 Processor Only
d. Push the top cover downward into position. The flanges on the one side of the top
cover snap over the tabs on the base of the airflow guide.
e. Verify that the tabs are properly seated in the flanges.
The fan is now in the reverse position. (The fan's label is not visible.)
24
Flanges
snap over
the tabs
Tabs seated
in the flanges
Chapter 1