Was it a factory reset? If so you may have now wiped all the data from your box. I have an m8 box and posted a thread asking for help, but have had no help or replies , reason for coming to this forum, due to performing a factory reset after intermittent internet issues.
My box showed just the mbox start screen and stayed here.
I have downloaded new firmware and flashed the box which has now brought back my android GUI . You may want to google firmware for you model, and do some research into compatibility and procedures to install.