Connection failure of the Head FFC. The head is damaged due to a slant connection of the Head FFC or the like. The drive circuit in the Printhead is damaged. The fuse of the Main Board has blown.
Check the connecting part of Head FFC if there is any loose or slant connection, or ripped terminals or the breaking of the FFC. Replace the Head FFC. Replace the Printhead. If the printer does not recover from the error then replace the Main Board.