Do you have access to the 7150? Typically, during a power outage the switch will reboot and lose it's Power over Ethernet config.
You can gain access to the 7150 via the console, you'll need a USB cable. Here is a live stream recording where we discussed this:
(Time stamp is where the piece you're interested in starts)
https://youtu.be/opuE1wjC77M?t=4074
Best of luck!
It was replaced by builder and all good now. Thanks!
Awesome news! Thanks for reporting back and I'm happy to hear it was resolved!