Thank you for the detailed information you shared.
As you mentioned and we can see from the picture you shared, there are lights on PWR and SYST, if there is an amber/orange light on the "SYST" and a green light on the "PWR" on the Switch (as it is shown in the below picture). Meaning the Switch is stuck in the boot mode.
Basically, due to the power outage/ power spike, the switch went to a state that we call ‘boot mode’ that is not able to boot up properly.
Please follow the below steps to fix this issue:
First, we will try to reset the Switch as described below:
1. Please try to disconnect from the Power outlet the ICX-7150 and reconnect.
2. Please try to press the reset button using a paper click or a small stick
Remove power from the switch.
Press and hold the Reset button while applying power to the switch.
After all the system LEDs flash amber, release the Reset button.
Below is the Guide and Videos link for your reference:
IF RESET IS NOT WORKING, PLEASE TRY TO RESET YOUR SWITCH MULTIPLE TIMES (Like 10-15 times) AS DESCRIBED ABOVE.
IF RESET DOESN’T WORK: Please follow the below steps.
If the reset does not make any difference, we need to perform a software recovery since it can be that the image flash is corrupted in basic words the unit is not able to boot up properly and need re-install the image to boot up properly.
Below is the Guide and Video Link to perform the Software recovery process: