MFC-9420CN
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MFC-9420CN
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Popular
Updated:22/07/2026
These are the most viewed FAQs, ranked by popularity.
- 1.Printouts have wrinkles or creases.
- 2.White spots appear.
- 3.The error message "No Supported Devices Found" appears in Brother iPrint&Scan (mobile device).
- 4.When I try to dial a One Touch or Speed Dial number, my Brother machine's LCD reads "Not Registered."
- 5.I'm using Windows. When I try to Scan to E-mail I get an error saying "the command line argument is not valid. Verify the switch you are using".
Latest
These are the latest FAQs, sorted by last update date.
10/06/2026
How to identify your Operating System (OS).
13/05/2026
Check the IP addresses of your PC and the Brother machine
30/04/2026
Uninstall the drivers (Windows)
12/02/2026
I cannot find a file downloaded from the Brother support website (For Windows)
14/12/2023
Discover the MAC address of the Brother network card