MFC-L3750CDW
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FAQs & Troubleshooting |
![](/g/b/img/product/mfcl3750cdw_us_eu_as.jpg)
MFC-L3750CDW
Date: 14/09/2020 ID: faq00002458_007
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.
- Disconnect the device from the USB direct interface.
- Turn the machine off and then on again.
For more information about the supported USB devices, see the "Specification" section.
MFC-L3750CDW, MFC-T910DW, MFC-T920DW
If you need further assistance, please contact Brother customer service:
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