Dell Precision 330 - Manual (Page 63)

Installing Upgrades 63
Ro t a t i n g t h e P o w e r S u p p l y ( D e s k t o p C h a s s i s )
When you have finished accessing components on the system board, rotate
the power supply back to its original position until the release latch snaps
into the securing tab.
Front Panel (Mini Tower Chassis Only)
CAUTION: Before you perform this procedure, see " Safety First—
For You and Your Computer ."
To remove the front panel, you first must remove the computer cover . With
the cover removed, release the front panel by pressing the green front-panel
release button marked with the icon (see the following figure).
power supply
securing tab
release latch
AC power
cable