HP Pro 3330 Microtower Maintenance & Service Manual page 147

6. On the inside of the computer, press the tab at the front of the power supply (1), pull the power
supply forward (2), slide it back and toward the side of the computer so it can sit lower on the
bottom of the computer, and then rotate it and lift it out of the computer (3).
Figure 8-37 Removing the power supply
To install the power supply, reverse the removal procedure.
CAUTION: When installing the power supply cables, make sure they are properly positioned so
they are not cut by the drive cage and are not pinched by the rotating power supply.
Power Supply 137