Replacing Components
Replacing Power Supplies
3.Insert the power supply into the opening. Slide it all the way in until it connects to the switch. The power supply face plate will be flush with the back face of the switch.
tighten the four screws
Figure4.Tighten the four retaining screws that hold it in place. Be careful not to overtighten the screws.
For more detail refer to the ProCurve Switch zl Internal Power Supply
Installation Guide
Replacing Components