MFC-7840N
![]() |
FAQs & Troubleshooting |

MFC-7840N
Search by Keyword(s)
Categorized
How To / Troubleshooting
Setup / Settings
Consumables & Accessories / Routine Maintenance
Others
Popular
Updated:01.08.2025
These are the most viewed FAQs, ranked by popularity.
- 1.Unable to print or scan when using Brother iPrint&Scan from my Windows Phone® mobile device.
- 2.Scan and save a document in PDF format (Scan to File)
- 3.Can I print from and scan to iPhone, iPod touch and iPad?
- 4.The message "[file name] can't be opened because it is from an unidentified developer." appears on OS X v10.8.x.
- 5.Scan multiple pages into one file instead of each scan being saved as a separate file.
Latest
These are the latest FAQs, sorted by last update date.
30.07.2025
I'm using Voice Over Internet Protocol (VoIP) and am having problems receiving faxes.
30.07.2025
I am having a problem receiving faxes.
30.07.2025
Why doesn't the machine answer when receiving a call?
16.04.2025
I cannot print using my Brother machine on a wired network. (Windows/macOS)
16.04.2025
I cannot print from my computer via USB.