FAQs & Troubleshooting
![]() |
Popular |
![](/g/b/img/product/mfc9840cdw_all.jpg)
MFC-9840CDW
366 Results
1.
I installed the Full Driver & Software Package, but some applications were not installed. (For Windows 10)
2.
The error message "No Supported Devices Found" appears on the Brother iPrint&Scan screen (mobile device).
3.
White spots or hollow print appears.
4.
I am using Safari in Mac OS X. When I created a CSR or a Self-signed Certificate using the IP address to configure the "Common Name" and I try to access the Print Server using Safari with SSL communication, Safari issues an alert.
5.
Can I print from and scan to iPhone, iPod touch and iPad?
6.
My printed documents are incomplete or a blue screen appears when printing or using PC-FAX after a Windows 10 update (March 2021)
7.
Unable to print or scan when using Brother iPrint&Scan from my Windows Phone® mobile device.
8.
Unable to print or scan when using Brother iPrint&Scan from my Android™ mobile device.
9.
Which connection can I use to print from my device (Android™) using the Brother iPrint&Scan?
10.
Which connection can I use to print from my device (iPhone, iPod touch, iPad) using the Brother iPrint&Scan?
11.
The error message "Invalid format for short nick name" appears when printing a document. (Mac OS X 10.5 or greater)
12.
Printouts have toner scatter or toner stain.
13.
How do I turn off/on the Toner Save Mode?
14.
The image is ghosted.
15.
Nothing is printed on the page or some colors are missing.
16.
Can I print from or scan to Android™ Smartphone?
17.
Duplex (two-sided) scan
18.
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?
19.
I cannot connect to the printer via Wi-Fi Direct using the Brother Print Service Plugin (Android™ 12 or later).
20.
I cannot install Brother drivers on Debian 10 or later (Linux)
21.
What is Brother iPrint&Scan?
22.
Adjust color settings by using the custom setting in the printer driver
23.
The printer status is Offline or Paused.
24.
Spots are printed at 75mm.
25.
Scan and save a document in PDF format (Scan to File)
26.
Color around the edge of printing is incorrect.
27.
Pre-Required Procedures (Linux)
28.
Print data from the Clipboard in Brother iPrint&Scan when using an iPhone, iPod touch and iPad.
29.
When I try to dial a One Touch or Speed Dial number, my Brother machine's LCD reads "Not Registered."
30.
Can I connect a telephone on the same line as the Brother machine in Fax/Tel Mode?