Hello Is the white box int the closet showing SYST LED amber ? If so, please follow step 1 if no, please follow step 2.
Have you tried to perform a factpry reset? If not please try:
Step 1: Factory reset:
Remove power from the switch.
Press and hold theResetbutton while applying power to the switch.
After all the system LEDs flash amber, release theResetbutton.
When all the system LEDs blink green, all the configuration data are erased and the switch is returned to its factory configuration. When all the system LEDs are solid green, the erase process is complete and the system reloads. Once reloaded and the SYST LED is steady green, the factory reset is complete.
Ruckus ICX 7150/7650 -ERASE SYSTEM TO FACTORY DEFAULT WITH RESET BUTTON(Tutorial video)
Based on your description, it seems that the Switch (ICX7150 Switch) is stuck in boot mode after a power interruption, so the unit will not pass any kind of traffic, in order to fix the problem, you will have to perform a software recovery which requires, two connections between your ICX to a computer, I am going to advise use a window because the steps are easier, one connection will be the console connection, using a type C/USB cable, where type C will be connected to the ICX7150 Switch and the USB to your computer, finally the second connection will be a regular Ethernet cable connected between the computer and the out-of-band management port on your Switch, don't worry because the following guide will explain in detail the step by step.