Replace a PA-7500 Series Firewall AC or DC Power Supply

1. Put the provided ESD wrist strap on your wrist ensuring that the metal contact is touching your skin. Then attach (snap) one end of the ground cable to the wrist strap and remove the alligator clip from the banana clip on the other end of the ESD grounding cable. Plug the banana clip end into one of the ESD ports located on the appliance before handling ESD sensitive hardware.
2. Locate the failed power supply by viewing the system logs or by viewing the LED on the front of the power supply. A red LED indicates a failed power supply. For details on the power supply LEDs, see Interpret the PA-7500 Series Firewall LEDs.
3. Shut off power to the failed power supply.
   (AC only) Unplug and remove the power cord (leaving the cord in place can cause arcing inside the appliance).
   (DC only) Power off the DC power source that is connected to the failed DC power supply.
4. Facing the rear side of the appliance, push the power supply latch handle upwards with your thumb to disengage the latch from the appliance. With the latch still pushed up, pull on the metal handle to slide the power supply out.

5. Remove the replacement power supply from the packaging.
6. Slide the new power supply into the empty power supply slot until you hear the latch click into place. Pull on the metal handle to ensure that the power supply latch is fully engaged and the power supply is locked into the appliance.

7. Turn on power to the new power supply.
   (AC only) Plug the power cable into the corresponding AC power module on the back of the appliance. The new power supply turns on and the LED will turn green.
   (DC only) Insert the DC power cable back into the power supply ensuring that the notches line up correctly. The plastic clips on each side of the connector will clip into place as you seat the cable.

   When cabling the DC power supply to your power source, ensure that you route the cable in such a way that it does not put pressure on the plastic clips located at the front of the power supply. It is best to route and secure the cable first and then plug the cable into the power supply.