MFC-7420
FAQs & Troubleshooting |

MFC-7420
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Popular
Updated:14/04/2026
These are the most viewed FAQs, ranked by popularity.
- 1.I cannot use the Scan to E-mail with Outlook2003 or Outlook2007 after updating ControlCenter3. The error message "command line argument is invalid" appears. What can I do?
- 2.My printed documents are incomplete or a blue screen appears when printing or using PC-FAX after a Windows 10 update (March 2021)
- 3.How do I clean white or black spots on printed documents?
- 4.I get an error "Print Queue is stopped". (Mac OS X 10.2 - 10.4)
- 5.The error message "No Supported Devices Found" appears on the Brother iPrint&Scan (mobile device).
Latest
These are the latest FAQs, sorted by last update date.
13/04/2026
How to identify your Operating System (OS).
05/02/2026
I cannot find a file downloaded from the Brother support website (For Windows)
30/07/2025
I'm using Voice Over Internet Protocol (VoIP) and am having problems receiving faxes.
16/04/2025
I cannot print from my computer via USB.
19/06/2024
I cannot install the fax driver (brmfcfaxdrv) in Fedora 40 or later, or in its derivatives. (Linux)