Hope you are doing well
Is quite simple to recover the Unit from boot mode:
The first step is to connect an ethernet to the ICX management port and assign an IP on the PC that is of the same range that we are going to configure in the commands below.
Then console the unit and follow the below parameters
Display the Boot Settings
Here is the data that shows this process (software recovery from boot mode)
Here is a video link that shows this process:
I hope this information can be useful for you