***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]

My ImageClass MF4770n 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.