FAQs & Troubleshooting
![]() |
Popular |
![](/g/b/img/product/mfcl3780cdw_us_as.jpg)
MFC-L3780CDW
164 Results
Note: “*” indicates that the content is from the Online User’s Guide.
1.
(Video) Set up your Brother machine
2.
(Video) Paper is Jammed in the 2-sided Tray
3.
(Video) Paper is Jammed in the Back of the Machine
4.
Set Telephone Line Compatibility for Interference and VoIP Systems
5.
The color of your printouts is not what you expected
6.
The scanning speed is slow when scanning from my machine. (Windows)
7.
I updated my Windows 11 PC through Windows Update and I can no longer Print, Scan or Fax from my PC.
8.
What is the default password for my Brother machine?
9.
Media Type Mismatch or Media Mismatch
10.
How to identify your Operating System (OS).
11.
I still receive the error message "Replace Drum", "Drum End Soon" or "Drum Stop" after I replace the drum unit with a new one.
12.
(Video) Paper is Jammed inside the Machine
13.
I cannot repair the wired or wireless connection using the Network Connection Repair Tool (Windows)
14.
Too Many Trays
15.
What is the default password for my BRAdmin or Web Based Management?
16.
Vertical colored streaks or bands appear on the page
17.
I cannot use Gmail for Email functions (such as Scan-to-Email) and Internet Fax (I-Fax)
18.
Connect a Brother machine to a wireless (Wi-Fi) network using the Brother Mobile Connect app
19.
Install the Brother Mobile Connect application (for mobile device)
20.
Protect your Brother machine against unauthorised access over the network
21.
Open the Status Monitor (Windows)
22.
(Video) Paper is Jammed in the Manual Feed Slot
23.
Unusable Device
24.
Toner Low
25.
(Video) Paper is Jammed in the Paper Tray
26.
A security warning appears when accessing Web Based Management via HTTPS.
27.
Open the Control Panel (For Windows)
28.
I cannot install the scanner driver (brscan5) in Fedora 40 or later. (Linux)
29.
Add your Brother machine with AirPrint (macOS)
30.
I cannot print or scan via USB on Fedora 38 or later and on their derivatives (Linux)