MFC-7840W
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FAQs & Troubleshooting |

MFC-7840W
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Popular
Updated:07/31/2025
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 cannot connect to the printer via Wi-Fi Direct using the Brother Print Service Plugin (Android™ 12 or later).
- 3.What is Brother iPrint&Scan?
- 4.The error message "Invalid format for short nick name" appears when printing a document. (Mac OS X 10.5 or greater)
- 5.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?
Latest
These are the latest FAQs, sorted by last update date.
07/30/2025
I'm using Voice Over Internet Protocol (VoIP) and am having problems receiving faxes.
07/30/2025
I am having a problem receiving faxes.
07/30/2025
Why doesn't the machine answer when receiving a call?
04/16/2025
I cannot print using my Brother machine on a wired network. (Windows/macOS)
04/16/2025
I cannot print from my computer via USB.