I ran this on my eureka rom Chromecast last night and the script seemed successful and then said rebooting, I saw flashcast on my tv but now it just shows white "chromecast..." letters on a black screen. I had it plugged into power on the TV's usb port during the process is there a chance it needed more power during the flash and got corrupt? Any ideas to try to revive it?
How long did you wait in recovery (flashcast)?
This new method is taking 5-10 minutes inside the recovery in order to flash an update. It used to take less than a minute, but I this auto-root method is more demanding.