Based on your description, it seems like your switch is running from routing code, due the power outage the switch starts running the wrong code
To solve this issue, you can connect to your local router via Ethernet or Wi-Fi and your are not going to have connectivity issues from there
Here's a short Guide about the normal setup for home users:
Where the main (white) box in your cabinet is the switch (ICX 7150-12CP)
And the boxes on the ceiling are the Wireless Access Points
Most common Setups for Lennar homes users
We have 2 ways to access to the Switch 1- In a logical way via Ip address (IPs are logical addresses given by the local router) so we would have to track which IP is that of the Switch (that is using).
1-This guide show you how to track the IP address of the Switch
How to find my Ruckus “Devices IP address” using free applications
2-This guide show you how to access remotely to your switch
How to remotely access to 'ICX 7150-12P' or 'access points' "Network devices"
3-This guide contains the usernames and passwords if accessing on the switch ask you for that
Admin usernames and passwords for the Ruckus Wi-Fi Access Points/Switch for Lennar home users
4-Here are the steps how to fix the ‘routing code’ step by step (2 guides)
The other method to access to the switch is via console (cable access) in this case we need a USB type C to USB standard or Console cable Rj45 to USB.
1-Here is the guide on how to access through the console and pre-install the necessary software
How to console in an ICX-7150-12c
2-Once you are log in you can follow up the Routing code guides to fix the issue that are on the step ‘4’
Also you can use the below link to solve this issue.
Lennar Home Community