Canon imageCLASS D420 stuck on "Bios updating, please wait"?

Canon imageCLASS D420 stuck on "Bios updating, please wait"?

I have a Canon Imageclass d420 multi printer. it started the bios update on its own and it will not finish the update. I tried unplugging the unit and followed the suggested fixes, but I cannot get any response to the machine. if there is an hard reset I would like to resolve the issue. I called Canon Tech they said to send the unit in to be repaired. if anyone has any ideas please respond.