HP 4600 error 49.90

[CityofHeroes]

The current display say error 49.90. When I display all the errors it displays 59.90 and 54.19. The errors say to replace the DC controller card (error 54.19) and Image Transfer Kit(error 59.90). I have replaced all required parts needed to fix this printer (from error codes displayed), but I still get the same error when booting up printer.

Thanks