According to your description, seems the Switch is booting from the incorrect partition after the power outage causing the connection issues, Please follow up the guide to fix the issue.
How to Fix Routing code issues on Lennar Home users via Web GUI.
How to Fix Routing code issues on Lennar Home users via CLI
Guide#1 for CLI:
Guide#2 for CLI:
Note: if you have access to the Unleashed Dashboard and the Switch can be seen from there, it may look like the following image, ICX7150-C12-Router instead of ICX7150-C12-Switch, now before starting the steps of the guide, I will advise you to cable the computer directly to the Switch, since you will have a better connectivity than if you connect via wireless.
- After fixing the issue of the Switch booting from the wrong partition, please perform an upgrade to the code 08095g UFI and upgrade both partitions primary and secondary with the switching code file named SPS08095gufi.bin, take into consideration that is the Switch is running a code lower than 08080 you need to upgrade twice, from the code you are to 08080f and then the recommended code 08095g UFI.
How to Upgrade a Switch ICX-7150-C12P using a USB flash drive
How to upgrade a Switch ICX7150-C12P via TFTP
Upgrade a switch via Web GUI (ICX7150 Switch)
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