MFC-7840W
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FAQs & Troubleshooting |
MFC-7840W
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Popular
Updated:21/04/2026
These are the most viewed FAQs, ranked by popularity.
- 1.I installed the Full Driver & Software Package, but some applications were not installed. (For Windows 10)
- 2.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". What should I do?
- 3.A margin appears on the right side of the scanned document when using the Brother iPrint&Scan application on my Android™ mobile device.
- 4.Unable to print or scan when using Brother iPrint&Scan from my Android™ mobile device.
- 5.Can I print from and scan to iPhone, iPod touch and iPad?
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)
19/01/2026
I can print but cannot scan via network. (For Mac)
05/11/2025
I cannot find some option in the Printing preferences. (For Windows)
30/07/2025
I'm using Voice Over Internet Protocol (VoIP) and am having problems receiving faxes.