Registration failed. Do one of the following:

• Press and hold down (Power On/Off) to turn off the machine. Wait a few seconds, then turn it on again.
  Perform the automatic color registration using the machine's display.
  > Click here to see how to adjust the print position of each color.
• Install a new belt unit.
  > Click here to see the details of how to replace the belt unit.

If the issue continues, contact Brother Customer Service from the "Contact Us" section.