Troubleshooting Print Failures on the Brother MFC-L3720CDW

Printing problems can be incredibly frustrating, especially when you need your Brother MFC-L3720CDW to work right away. Many users think something is wrong with the printer itself, but often the issue comes from the computer not being able to “talk” properly with the printer. This usually happens because the software that helps your computer connect to the printer, also known as the printer’s setup file, is outdated, missing, or damaged.

The good news is that this is easy to fix. In this guide, you will learn simple and clear steps to help your Brother MFC-L3720CDW print again. You will also learn the easiest way to update the necessary files on your computer using DriverAssist, along with step-by-step instructions for fixing things manually through the Brother support page or Windows Device Manager. Everything is written for everyday Windows users so you can follow along without confusion.

Why the Brother MFC-L3720CDW Stops Printing or Becomes Unresponsive

Many printing problems begin when the computer no longer recognizes the printer correctly. This can cause issues such as the printer not responding, print jobs getting stuck, slow printing, or pages coming out blank.

This usually happens because:

• The computer is using old setup files
• The needed files are missing after a Windows update
• The files became damaged over time
• There is a conflict with other software on the computer

While these problems sound technical, the fix is simple. Updating the printer’s setup file ensures your computer can communicate smoothly with your Brother printer again. Once updated, the printer usually starts working normally right away.

The Easiest and Fastest Way to Update the Needed Files for Your Brother MFC-L3720CDW

For most users, the simplest method is using DriverAssist, an automated tool that finds the correct setup files for your Brother MFC-L3720CDW, installs them for you, and keeps them updated so the same problem does not happen again.

This method does not require you to search for files, choose between versions, or navigate the Brother support site. DriverAssist handles everything in just a few clicks, making it ideal for non-technical users.

Download DriverAssist here.

Once installed, the tool will automatically scan your computer, detect any printer-related issues, and guide you through fixing them quickly.

Manual Fixing Guide for the Brother MFC-L3720CDW

If you prefer to update the printer’s setup file yourself, there are two reliable ways to do it manually.

Method 1: Update Through the Brother Support Website

This method involves downloading the correct file from Brother’s official support page. Follow these steps carefully to avoid installing the wrong file.

Step 1: Open the Brother Support Page

Go to the Brother support website using your browser.
Search for “Brother MFC-L3720CDW support.”

Step 2: Select Your Operating System

You will be asked to choose your Windows version. Make sure to select the correct one.

Step 3: Look for the Printer Setup File Section

Find the section that provides the installation package for your printer. This file contains everything Windows needs to communicate with your Brother MFC-L3720CDW.

Step 4: Download the File

Click the download button and wait for the file to finish saving to your computer.

Step 5: Open the Downloaded File

Double-click the downloaded file. A setup window will appear.
Follow the on-screen instructions.

Step 6: Restart Your Computer

Restarting helps Windows recognize the updated files.

Step 7: Test Your Printer

Go to a website or open a document and try printing a test page.
If the printer responds normally, the issue is fixed.

Method 2: Update Through Windows Device Manager

This method uses a built-in Windows tool that lets you repair or update the system’s printer files.

Step 1: Open Device Manager

Right-click the Start button and select Device Manager.

Step 2: Find Your Printer

Look for “Printers,” “Print queues,” or “Other devices.”
Find the Brother MFC-L3720CDW.

Step 3: Right-Click the Printer Name

Choose “Update.”

Step 4: Choose the Automatic Search Option

Select the option that allows Windows to search your computer for updated files.
Windows will check what you already have and repair or install what is missing.

Step 5: Allow the Process to Complete

This may take a few minutes.

Step 6: Restart Your Computer

Restarting helps Windows apply the changes.

Step 7: Try Printing Again

Your printer should respond normally once the update is complete.

Other Helpful Tips if Your Brother MFC-L3720CDW Still Won’t Print

If the problem continues even after updating the required files, try these additional steps:

• Unplug the printer, wait 20 seconds, then plug it back in
• Restart your computer
• Make sure the printer is connected to Wi-Fi or USB
• Clear the print queue by canceling all pending print jobs
• Try printing a test page directly from the printer menu

If none of these steps work, the problem is almost always caused by old or damaged setup files that were not fully updated. At this point, most users prefer using DriverAssist since it ensures nothing is missed during the update process.

Download it here.

Final Thoughts

The Brother MFC-L3720CDW is a reliable machine, but printing issues can happen when the computer and printer stop communicating correctly. Updating the needed files on your computer is the most effective way to bring the printer back to normal. You can fix this quickly using DriverAssist or follow the manual steps using the Brother support site or Windows Device Manager. No matter which method you choose, the steps above will help you get your printer working again without stress or confusion.