HP Pavilion Slimline s5220f Supplementary Manual page 23

16 Push in the metal tab (1) above the fan as you tip out
the top of the fan (2), and lift the fan (3) partway out
of the computer. Without disconnecting the fan, set
it aside.
17 Remove the screw at the top of the drive cage. (This is
one of the short screws on select models.)
— Removing and Replacing the Hard Disk Drive
537496-001
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18 Remove the three screws on the front of the computer
that secure the drive cage in the computer. (These are
long screws.)
19 Remove the drive cage by moving it downward to
release it, and then lifting it partway out of the
computer.
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