HP Compaq Presario,Presario 8380 Supplementary Manual page 44

Removing the Fan
You may need to remove the fan to access removable
components from the motherboard, to add a card in
the top expansion slot, or to replace the fan.
Note:
The back panel and right side panel must be removed
before beginning this procedure.
1
With one hand below the fan for support, gently
pull the release mechanism on the top of the
fan (AA).
2
Slide the fan toward you approximately .5-inch.
3
Remove the fan from the frame and place out of
the way.
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Getting Help
AA