MFC-9840CDW
FAQs & Troubleshooting |

MFC-9840CDW
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Popular
Updated:22/07/2026
These are the most viewed FAQs, ranked by popularity.
- 1.What is Brother iPrint&Scan?
- 2.I still receive the error message "Replace Parts Drum" or "Drum End Soon" after I replace the drum unit with a new one.
- 3.How do I check if the machine has faxes in its memory when it has a mechanical problem?
- 4.Colored lines appear across the page.
- 5.Unable to print or scan when using Brother iPrint&Scan from my Windows Phone® mobile device.
Latest
These are the latest FAQs, sorted by last update date.
01/06/2026
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 am having a problem receiving faxes.