ColorQube 8900 firmware update loop

Hello, I was updating my current firmware (071.160.xxxxx) to firmeware (0.72.XXx.XXX ...) .. but it did not work. now the printer is restarting and entering the update screen but it does not finish and restart the update process resumes but does not finish .. the service is in loop and I can not but turn the printer on. I wanted to see with you if there is a process for me to format the machine? Thank you