***DOWNLOAD MODE*** Waiting - Frozen ImageClass D530 Printer

[rmao]

My ImageClass D530 cannot start. It shows "***DOWNLOAD MODE*** Waiting". If connected to computer then it becomes "***DOWNLOAD MODE*** USB Available". No key is functional. Power on/off many times could not solve the problem. Can anyone help me? Thanks.

[shk200]

I use windows 10, and my installation of the imageclass MF 4770n without any problem before for  a long time with the power on, however, I accidently turn off its power yesterday and It shows "***DOWNLOAD MODE*** Waiting". If connected to computer then it becomes "***DOWNLOAD MODE*** USB Available". No key is functional. Power on/off many times could not solve the problem.