FAQs & Troubleshooting

FAQs & Troubleshooting

Unusable Device

There are two cases when the display shows this message.


  • A broken device is connected to the USB direct interface.
  • A USB device or USB flash drive that is not supported has been connected to the USB direct interface.

Follow the steps below to clear the error message.


  1. Disconnect the device from the USB direct interface.
  2. Turn the machine off and then on again.

For more information about the supported USB devices, see the "Specification" section.



If your question was not answered, have you checked other FAQs?

Have you checked the manuals?

If you need further assistance, please contact Brother customer service:

Related Models

DCP-J572DW, HL-T4000DW, MFC-J4540DW(XL), MFC-L3750CDW, MFC-L3770CDW, MFC-T4500DW, MFC-T810W, MFC-T910DW, MFC-T920DW

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