Hi There,
I received my HX stomp today (first HX device), and it failed during the firmware update. The device seemed bricked, I couldn't get it to either update, restore the factory settings, or boot normally.
I then tried something out of the blue - downgrading the line6 updater to the 1.18 version. Not sure why I tried this as it doesn't really make any sense, but the firmware update worked like a charm from there on.
I saw many topics related to failed firmware update and bricked devices, so I thought I would share this experience in case it helps other to solve this issue, should it present itself.
happy modelling !