Have you tried a reset via recovery mode? Make sure you have a backup first. Also, clutching at straws here, but I would make sure I did not have anything other than the power plugged in while doing the reset. Definitely unplug anything in the expression pedal inputs as we know there was an issue in the previous firmware with them.
Once you are able to connect with support, they can also walk you through a process to reapply the firmware if necessary. Btw, are you using the stock power supply? If not, I would give that a try as well?