Solve Common Brother MFC-L3720CDW Communication Errors

The Brother MFC-L3720CDW is a reliable color laser printer, but like any home or office machine, it can begin to show communication issues over time. You might click Print and nothing happens. You might see messages that your computer cannot talk to the printer. You may also deal with slow responses, missing settings, or print jobs that never start. Many of these problems happen because the software inside Windows that helps the printer talk to the computer becomes outdated, damaged, or incomplete.

Most users are not familiar with this type of software. It acts like a translator that helps your computer and printer understand each other. If this translator is old or not working correctly, the printer may stop responding, even though the machine itself is fine. The good news is that updating this software is usually all it takes to fix these issues.

This guide will help you understand what causes these problems and show you the easiest ways to get your Brother MFC-L3720CDW working again. You will learn the simplest option first, then two step-by-step methods for updating the printer software manually through Windows and the Brother support page.

Why the Brother MFC-L3720CDW Shows Communication or Not Responding Errors

Communication problems with the Brother MFC-L3720CDW happen when the software that runs the printer connection inside Windows becomes outdated, missing, or corrupted. This can occur after a Windows update, after unplugging the printer without using the proper steps, after a long period of not updating your computer, or after installing new programs that accidentally overwrite or interrupt printer-related software.

When this happens, Windows does not know how to talk to your printer the right way. Your computer might still see the printer, but it cannot send print jobs correctly. This leads to messages like:

• The printer is not responding
• Windows cannot communicate with the printer
• Nothing prints even though the job shows in the queue
• The printer disappears from the list of available printers
• Print quality becomes inconsistent or features stop working

Once the correct software is updated, these communication problems usually disappear immediately.

The Easiest Fix for Brother MFC-L3720CDW Communication Problems

For most users, the fastest and simplest solution is to use DriverAssist. It automatically finds the correct software your Brother MFC-L3720CDW needs, downloads it, and installs it with no complicated steps.

Instead of searching for files on websites, trying to match versions, or guessing which item in Windows needs updating, DriverAssist does all of this automatically.

Download DriverAssist here.

Once you install and open it, the tool checks your computer for missing, outdated, or broken printer software and then updates everything safely. This helps fix communication problems for the Brother MFC-L3720CDW in a few minutes.

How to Update Brother MFC-L3720CDW Software Manually

If you prefer fixing the issue yourself without using DriverAssist, the following two methods will guide you step by step. These take longer, but they are helpful for users who want to understand the process more closely.

Method 1: Update Through the Brother Support Website

Updating from the Brother support page is a reliable option, although it requires you to choose the correct file manually.

Step 1: Go to the Brother Support Page

Search online for “Brother MFC-L3720CDW support page” in your browser. Look for the official Brother website.

Step 2: Select Your Operating System

Once you are on the support page, go to the section that lists downloads for your printer. Choose your version of Windows from the list so the page can show the correct software.

Step 3: Look for the Full Software Package

Brother usually provides a complete package that includes everything the printer needs. This is the best option for most users because it replaces the old or damaged files entirely.

Click the download button and save the file to your computer.

Step 4: Open the Installer

Find the downloaded file in your Downloads folder. Double-click it to start the installation. Follow the on-screen steps. These steps vary depending on the version Brother provides, but most will ask you to agree to the terms, then click Next several times.

Step 5: Restart Your Computer

Once the installation finishes, restart your computer to make sure the new software is loaded properly.

Step 6: Try Printing Again

Open any document and choose Print to confirm that the Brother MFC-L3720CDW is responding again.

Method 2: Update Through Windows Device Manager

Device Manager is a built-in tool inside Windows that helps you check and update the software for your connected devices.

Step 1: Open Device Manager

Right-click the Windows Start button. Choose Device Manager from the menu.

Step 2: Find Your Brother Printer

Look for a section called Printers or Print queues. Expand it and look for “Brother MFC-L3720CDW”.

If you do not see it there, check under Other devices or USB devices.

Step 3: Open the Update Options

Right-click the Brother MFC-L3720CDW name and choose Update.

You will see two options:

• Search automatically
• Browse manually

Choose Search automatically if you want Windows to look for the update online.

Step 4: Allow Windows to Search

Windows will search your computer and Microsoft’s servers for updated software. If it finds a match, it will install it automatically.

Step 5: Restart Your Computer

Restarting helps Windows apply the new changes correctly.

Step 6: Test Your Printer

Try printing a simple page to confirm the update worked.

Tips to Keep the Brother MFC-L3720CDW Working Normally

Keeping your printer running smoothly is much easier when the communication software is current. Here are simple habits that help avoid future issues:

• Restart the printer and computer when printing stops unexpectedly
• Keep Windows updated so your system can communicate correctly
• Avoid unplugging the printer while it is still in use
• Update the printer software whenever Windows notifies you
• Use DriverAssist to ensure all communication files stay current

These steps help prevent future “not responding” problems and make sure your computer always recognizes the printer.

Conclusion

Communication problems are some of the most common issues Brother MFC-L3720CDW users experience. Even if the printer, cables, and Wi-Fi are working, the computer may still fail to send print jobs if the software that connects them becomes outdated or damaged. Updating this software is usually the key to fixing the problem.

DriverAssist provides the quickest and simplest way to update everything automatically. For users who want to handle things manually, both the Brother support website and Windows Device Manager offer reliable methods as well. Once the software is updated, the printer usually responds right away, and printing becomes smooth again.