# 1-866-203-7571 How to Fix Brother MFC-L3750CDW Offline Issue?

**Brother Printer Support at 1-866-203-7571**.

The Brother MFC-L3750CDW is a popular all-in-one color laser printer known for its speed, wireless efficiency, and reliability. Despite its robust performance, users occasionally face one common and frustrating problem: the **“Brother MFC-L3750CDW Offline”** error. When this error appears, the printer refuses to communicate with your computer, halts print jobs, and interrupts workflow.

If you’re facing the offline error on Windows or Mac, or if your Wi-Fi-connected printer keeps disconnecting, this comprehensive guide will help you troubleshoot and restore your printer back online.

This article covers **every step**, from basic checks to advanced fixes, driver repair, network optimization, and configuration settings you must apply to permanently resolve the issue. And if you need expert help, you can always call **Brother Printer Support at 1-866-203-7571**.

**Brother Printer Support at 1-866-203-7571**.

# **Table of Contents**

1. Introduction
2. Understanding Why Brother MFC-L3750CDW Shows Offline
3. Quick Checklist Before You Begin
4. Method 1: Restart Printer and Network Devices
5. Method 2: Check Printer Status in Windows / Mac
6. Method 3: Disable Use Printer Offline (Windows)
7. Method 4: Set Brother MFC-L3750CDW as the Default Printer
8. Method 5: Fix Connectivity Issues

* Wi-Fi
* USB
* Ethernet
9. Method 6: Reconnect Printer to Wi-Fi Network
10. Method 7: Reinstall or Update the Brother Printer Driver
11. Method 8: Assign a Static IP to Prevent Offline Errors
12. Method 9: Reset Print Spooler Service (Windows)
13. Method 10: Disable Firewall or Security Software Blocking
14. Method 11: Add Printer Using IP Address Manually
15. Method 12: Update Printer Firmware
16. Method 13: Factory Reset the Printer (Last Option)
17. Tips to Prevent Offline Problems in the Future
18. When to Call Brother Support – 1-866-203-7571
19. Conclusion

**Brother Printer Support at 1-866-203-7571**.

# **1. Introduction**

Technology makes life easier—until it doesn’t. Picture this: you urgently need to print an important document, but when you hit 'Print,' your system says **“Brother MFC-L3750CDW Printer Offline.”**

You check the printer—it’s powered on. The Wi-Fi signal seems strong. The cables seem fine. But still, the offline problem continues.

If this sounds familiar, you’re not alone. Offline issues are among the most common problems faced by Brother printer users, especially wireless models like the **MFC-L3750CDW**. Fortunately, most of these issues stem from miscommunication between the printer and computer—and can be resolved with the right steps.

This guide will walk you through **exactly how to fix your Brother MFC-L3750CDW offline problem** easily and effectively.

**Brother Printer Support at 1-866-203-7571**.

# **2. Why Does Brother MFC-L3750CDW Go Offline?**

There is no single cause of the offline error. It can occur due to:

### **✔ Network Connectivity Issues**

Weak Wi-Fi, incorrect SSID, router interference, or network dropouts.

### **✔ Printer Not Set as Default**

The computer may be trying to print to a “Copy” version of the printer.

### **✔ Printer Driver Errors**

Outdated, corrupted, or missing drivers.

### **✔ IP Address Conflicts**

If your router assigns a new IP each time, your PC may lose connection.

### **✔ Printer Settings Misconfiguration**

“Use Printer Offline” may be enabled by mistake.

### **✔ Firewall Blocking Communication**

Antivirus or firewall software can block the printer from appearing online.

### **✔ Print Spooler Malfunction**

Pending print jobs can freeze communication.

Understanding the cause helps you apply the right fix. Below, we cover **all solutions** step-by-step.

**Brother Printer Support at 1-866-203-7571**.

# **3. Quick Checklist Before You Begin**

Before jumping into deeper troubleshooting, make sure the basics are covered:

* The printer is **turned ON**.
* No **error lights** or messages (like Toner Low, Paper Jam).
* Printer is connected to **the same Wi-Fi network** as your computer.
* The Wi-Fi signal is strong (ideally 3 bars or more).
* USB/Ethernet cable is properly connected (if applicable).

If all these are okay, move on to the methods below.

**Brother Printer Support at 1-866-203-7571**.

# **4. Method 1: Restart Printer and Network Devices**

A simple restart can fix 70% of offline issues.

### **Steps:**

1. Turn OFF your Brother MFC-L3750CDW.
2. Unplug the printer from the socket.
3. Restart your Wi-Fi router and modem.
4. Wait 2 minutes until the network stabilizes.
5. Power the printer back ON.

Check if the offline status is gone.

**Brother Printer Support at 1-866-203-7571**.

# **5. Method 2: Check Printer Status in Windows / Mac**

### **On Windows:**

1. Press **Windows + R** → Type **control printers** → Press Enter.
2. Right-click your Brother MFC-L3750CDW.
3. Select **See what’s printing**.
4. Ensure **Pause Printing** and **Use Printer Offline** are NOT checked.

### **On Mac:**

1. Go to **System Settings → Printers & Scanners**.
2. Select **Brother MFC-L3750CDW**.
3. Check if it says **Ready** or **Offline**.
4. Click **Resume** if needed.

**Brother Printer Support at 1-866-203-7571**.

# **6. Method 3: Disable “Use Printer Offline” (Windows)**

This is a common reason for offline errors.

### **Steps:**

1. Open **Control Panel → Devices and Printers**.
2. Right-click Brother MFC-L3750CDW.
3. Select **See what’s printing**.
4. Click the **Printer** menu.
5. Uncheck **Use Printer Offline**.

**Brother Printer Support at 1-866-203-7571**.

# **7. Method 4: Set Brother MFC-L3750CDW as the Default Printer**

Sometimes the system creates duplicate printer copies.

### **Steps:**

1. Go to **Devices and Printers**.
2. Look for multiple Brother printers.
3. Right-click the one that says **Online**.
4. Click **Set as Default Printer**.

**Brother Printer Support at 1-866-203-7571**.

# **8. Method 5: Fix Connectivity Issues**

Offline errors on the Brother MFC-L3750CDW are mostly due to **network problems**.

**Brother Printer Support at 1-866-203-7571**.

## **A. If Using Wi-Fi:**

### **1. Check Wi-Fi Signal Strength**

From the printer:

* Press the **Menu** button.
* Navigate to **Network → WLAN → Connection Status**.

If the signal is below 50%, move the printer closer to the router.

**Brother Printer Support at 1-866-203-7571**.

## **B. If Using USB:**

* Make sure the cable is not loose.
* Use a high-quality USB cable.
* Plug directly into the computer—avoid USB hubs.

**Brother Printer Support at 1-866-203-7571**.

## **C. If Using Ethernet:**

* Ensure the Ethernet light on the router is active.
* Try a different cable or port.

**Brother Printer Support at 1-866-203-7571**.

# **9. Method 6: Reconnect Brother MFC-L3750CDW to Wi-Fi**

A fresh connection often resolves offline problems.

### **Steps:**

1. Go to **Menu** → **Network**.
2. Select **WLAN** → **Setup Wizard**.
3. Choose your Wi-Fi network.
4. Type your password.
5. Press **OK**.

After reconnecting, print the **Network Configuration Report** to confirm.

**Brother Printer Support at 1-866-203-7571**.

# **10. Method 7: Reinstall or Update Brother Printer Driver**

Driver-related issues often cause offline errors in Windows and Mac.

**Brother Printer Support at 1-866-203-7571**.

## **On Windows:**

### **A. Uninstall Old Driver**

1. Go to **Control Panel → Programs & Features**.
2. Uninstall **Brother Printer Driver & Utilities**.

### **B. Install New Driver**

1. Visit Brother Support (or your model’s driver page).
2. Download **Full Driver & Software Package**.
3. Install and restart the PC.

**Brother Printer Support at 1-866-203-7571**.

## **On Mac:**

1. Go to **System Settings → Printers & Scanners**.
2. Delete Brother MFC-L3750CDW.
3. Download and install the latest Mac driver.

**Brother Printer Support at 1-866-203-7571**.

# **11. Method 8: Assign a Static IP Address**

This prevents the printer from losing connection due to IP changes.

### **Steps:**

1. Print Network Report from printer.
2. Note the **IP Address**.
3. Open the router admin page.
4. Go to DHCP Settings.
5. Assign the printer’s MAC address a **static IP**.

This eliminates offline errors permanently.

**Brother Printer Support at 1-866-203-7571**.

# **12. Method 9: Restart Print Spooler Service (Windows)**

The print spooler sometimes gets stuck.

### **Steps:**

1. Press **Windows + R** → Type **services.msc**.
2. Find **Print Spooler**.
3. Right-click → **Restart**.

**Brother Printer Support at 1-866-203-7571**.

# **13. Method 10: Disable Firewall / Antivirus Blocking**

Firewalls may block the printer.

### **Steps:**

1. Open your antivirus or firewall software.
2. Disable network blocking temporarily.
3. Try printing again.

If it works, add the printer to the **allowed devices** list.

**Brother Printer Support at 1-866-203-7571**.

# **14. Method 11: Add Printer Using IP Address Manually**

### **On Windows:**

1. Go to **Settings → Devices → Printers & Scanners**.
2. Click **Add a Printer**.
3. Select **Add via IP Address**.
4. Enter the printer’s IP.

**Brother Printer Support at 1-866-203-7571**.

### **On Mac:**

1. Go to **Printers & Scanners**.
2. Click **+**.
3. Select **IP** tab.
4. Enter IP and add.

**Brother Printer Support at 1-866-203-7571**.

# **15. Method 12: Update Printer Firmware**

Firmware ensures stability.

### **Steps:**

1. Download **Brother Firmware Update Tool**.
2. Connect printer via Wi-Fi or USB.
3. Run the update.

**Brother Printer Support at 1-866-203-7571**.

# **16. Method 13: Factory Reset Printer (Last Resort)**

If nothing works:

### **Steps:**

1. Go to **Menu → Initial Setup**.
2. Press **Reset**.
3. Select **Network Reset** or **Factory Reset**.
4. Reconnect Wi-Fi and reinstall drivers.

**Brother Printer Support at 1-866-203-7571**.

# **17. Tips to Prevent Future Offline Issues**

* Keep the printer close to the router.
* Update Windows/macOS regularly.
* Use a static IP for stable connectivity.
* Do not overload the print queue.
* Restart router weekly.
* Keep drivers updated.

**Brother Printer Support at 1-866-203-7571**.

# **18. Still Facing Issues? Call Brother Support – 1-866-203-7571**

If your Brother MFC-L3750CDW still shows offline even after following all troubleshooting steps, it may require:

* Deep driver cleanup
* Network reconfiguration
* Advanced firmware repair
* Wireless diagnostics

For instant help, call **Brother Printer Support at 1-866-203-7571**.

Expert technicians are available 24×7.

**Brother Printer Support at 1-866-203-7571**.

# **19. Conclusion**

The **Brother MFC-L3750CDW Offline** issue is common but completely fixable. Whether the problem lies in network connectivity, drivers, IP conflicts, or printer settings—this guide gives you every solution you need.

By following these troubleshooting steps, you can restore your printer to online mode quickly and ensure smooth printing in the future.

If the issue persists or you prefer expert assistance, contact **1-866-203-7571** for immediate support.