Your Brother scanner was working yesterday. Now it shows “Connecting to PC” indefinitely or displays “No devices found” when you try to scan. This frustrating issue affects thousands of Brother users, especially after Windows updates or network changes. The good news is that over 90% of Brother scanner not working cases stem from software and driver issues you can fix at home.
This guide walks you through every proven solution, from simple power cycles to driver reinstalls and network fixes. You’ll learn to diagnose whether the problem is hardware or software, fix common error codes, and prevent future issues. Whether you own an MFC-L3770CDW, ADS-1700, DCP-J774N, or another model, these steps will restore your scanning capability.
Quick Fixes: Power Cycle and Check Connections
Before diving into complex solutions, rule out simple physical issues. About 30% of scanning failures resolve with basic checks.
Restart Devices Properly
Temporary glitches often cause communication breakdowns between your scanner and computer. Follow this sequence for best results:
• Turn off your Brother machine completely (not just sleep mode)
• Shut down your computer
• Wait 30 seconds to clear residual power
• Power on the Brother device first and wait for it to fully boot
• Turn on your computer last
This order ensures the scanner is ready before Windows attempts to detect it.
Inspect Cables and Connections
For USB scanners, unplug and reseat the cable at both ends. Try a different USB 2.0 or higher cable, as faulty cables are a common culprit. Plug directly into a rear USB port on your PC rather than a front port or hub, which may have weak power delivery.
For Wi-Fi models, check that the network indicator light is solid, not blinking. Ensure your Brother scanner and PC are on the same network, not on separate guest networks.
Check if Windows Detects Your Brother Scanner
Even when scanning fails, your system might still recognize the device. Verifying detection helps narrow down the cause.
Use Scanners and Cameras
Open Control Panel and search for “Scanners and Cameras.” Click to view scanners and cameras. Look for your Brother model in the list. If found, right-click and select Properties, then click Test to attempt a scan. If not listed, driver installation is incomplete or failed.
Check Device Manager
Press Windows + S, type Device Manager, and press Enter. Expand “Imaging devices” or “Print queues.” Look for a Brother entry. A yellow exclamation mark indicates driver error. If completely missing, no driver is installed.
If the scanner appears in Device Manager but not in scanning applications, the issue is likely WIA or TWAIN registration failure rather than hardware.
Make Your Brother Scanner the Default Device
Windows may detect your scanner but not use it unless you set it as the default device.
Set as Primary Scanner
Go to Settings, then Bluetooth & devices, then Printers & scanners. Find your Brother scanner, click it, and select “Set as default.” This tells Windows to route all scan requests to the correct device.
Remove Duplicate Entries
Old or conflicting installations leave behind ghost entries that confuse Windows. Delete any outdated or duplicate Brother devices, then reboot. Re-add the scanner after a fresh driver install.
Multiple device entries cause “No devices found” errors and prevent scanning requests from reaching the correct device.
Reinstall Brother Scanner Drivers the Right Way
Outdated or corrupted drivers are the number one cause of Brother scanner not working issues. A clean reinstall fixes most problems.
Step 1: Uninstall All Brother Software
Go to Settings, then Apps, then Installed apps. Uninstall every Brother-related program including Printer Driver, Scanner Driver, ControlCenter, and ScanKeyMgr. Use Brother’s official uninstall tool if available for your model.
Never skip this step, as residual files cause conflicts.
Step 2: Delete Leftover Files
Open File Explorer and navigate to C:\Program Files\Brother and C:\Program Files (x86)\Brother. Delete any remaining folders. This removes hidden configuration files that survive standard uninstalls.
Step 3: Reboot and Reinstall Fresh
Restart your computer completely. Visit support.brother.com and enter your exact model number. Select your operating system and download the Full Driver & Software Package, not just the driver. Run the installer as Administrator and allow all components to install, including ControlCenter, OCR, TWAIN, and WIA. Reboot again after installation.
Never rely on Windows Update for Brother drivers, as these are often outdated and lack essential scanning components.
Use Brother’s Built-In Scanner Repair Tools
Brother includes diagnostic utilities that fix scanning issues automatically, with a 70% success rate reported by users.
Run Scanner Driver Repair
Open Brother Utilities or ControlCenter from the Start Menu. Go to Maintenance or Troubleshooting. Run the Scanner Driver Repair, Network Connection Repair, and Device Status Check tools.
These tools re-register WIA and TWAIN drivers, verify driver integrity, test network connectivity, and reset communication protocols. Run them after any driver reinstall for best results.
Fix Network Scanner Issues with a Static IP
DHCP-assigned IP addresses change after router restarts, breaking scanner connections.
Why Static IP Helps
A static IP prevents address drift and ensures consistent network communication. It eliminates “scanner offline” errors after power cycles.
Set a Static IP
On your Brother machine, press Menu, then Network, then Report, then Network Configuration. Print the report and note the current IP address. Open a browser and enter the scanner’s IP address. Log in with default credentials (admin/access). Go to Network, then TCP/IP. Disable DHCP and assign a static IP outside your router’s DHCP range, such as 192.168.1.100. Save and reboot.
Now Windows always finds the scanner at the same address.
Diagnose Hardware vs Software Issues with Control Panel Scan
This test determines whether the problem is hardware or PC-side.
Perform a Direct Scan
On your Brother machine, press Scan. Choose Scan to PC or Scan to Image. Select your PC name or a folder. Place a document and press Start.
Interpret Results
If the scan succeeds, scanner hardware works and the issue is on your PC, likely involving drivers, firewall, or network settings. If it fails, you likely have an internal fault such as ADF jam, lamp failure, or firmware issue.
This direct scan is the gold standard diagnostic. Always run it before considering hardware replacement.
Resolve Specific Brother Scanner Error Codes
Specific errors point to precise solutions.
Fehler: Scan AF
This German error means “Error: Automatic Feeder Scan.” Causes include paper jam in ADF, dirty rollers, sensor fault, or driver issue. Fix by opening the ADF cover and removing any paper, cleaning rollers with a dry lint-free cloth, reinstalling the scanner driver, and running ADF maintenance in ControlCenter.
Error 48
This indicates the scanner module is not detected. Fix by reconnecting the USB cable or restarting Wi-Fi, reinstalling the driver, and testing on another PC. If it fails on another PC, hardware is likely faulty.
0x000011B
This Windows driver error commonly occurs after OS updates, especially on Windows 11. Fix by applying Microsoft’s PrintNightmare patch or using the local port workaround: add printer via IP, use Standard TCP/IP Port instead of WSD, then reinstall the driver.
WIA Error 9
This means the device is not responding. Fix by pressing Windows + R, typing services.msc, finding Windows Image Acquisition (WIA), right-clicking, and selecting Restart. Set the service to Automatic startup.
Restarting WIA often restores scanning instantly.
Allow Brother Scanner Through Firewall and Antivirus
Security software frequently blocks scanner communication.
Test by Disabling Temporarily
Turn off Windows Defender Firewall and any third-party antivirus. Try scanning. If it works, your security software is blocking Brother. Re-enable protection and add exceptions.
Add Brother to Exceptions
Go to Windows Security, then Firewall & network protection, then Allow an app. Click Change settings, then Allow another app. Browse to ControlCenter4.exe and ScanKeyMgr.exe in the Brother program folders. Add both and allow for private and public networks.
Also allow BrStMonWnd.exe, WSDAPI.dll, and the stisvc (Still Image service).
Never leave security software disabled. Use targeted exceptions instead.
Test Mobile Scanning to Diagnose the Problem
When PC scanning fails, use the Brother iPrint & Scan app to isolate the issue.
Install and Connect
Download Brother iPrint & Scan for iOS or Android. Open the app and wait for device detection. Select your Brother scanner and scan to email, cloud, or phone storage.
Diagnostic Value
If mobile scan works, the problem is PC-side, involving drivers, firewall, or OS issues. If mobile scan also fails, the issue is likely hardware or firmware related.
This app also serves as a reliable backup when PC scanning is unavailable.
Keep Brother Scanner Firmware Updated
Outdated firmware causes compatibility issues with Windows updates.
Update Firmware
Open ControlCenter, go to Maintenance, and select Firmware Update. Alternatively, use the Brother iPrint & Scan app or access the web interface via the scanner’s IP address, then go to Settings, then Firmware Update.
Best Practice
Update firmware every 3 to 6 months and always after major OS updates. Check support.brother.com for model-specific patches.
Firmware updates fix bugs, improve security, and restore scanning after Windows updates.
Prevent Brother Scanner Issues in the Future
Avoid repeat problems with these maintenance habits.
Schedule Quarterly Checks
Verify driver version in Device Manager under Driver Details. Confirm firmware is current. Re-run the Scanner Driver Repair tool every few months.
Use Cloud Scanning
Reduce PC dependency by setting up Scan to Google Drive, OneDrive, or Dropbox. Use Brother Web Connect for direct uploads. Enable email-to-scan functions.
Cloud scanning works even if PC drivers fail.
Avoid Generic Drivers
Always download drivers from Brother’s official site. Use the Full Package, not driver-only versions. Never let Windows Update install Brother drivers.
Final Checklist: Is Your Brother Scanner Working?
Verify these items:
• Power-cycled Brother machine and PC
• Verified Wi-Fi signal and IP address
• Installed Full Driver & Software Package as Administrator
• Set scanner as default device
• Removed duplicate entries
• Ran Scanner Driver Repair tool
• Added firewall exceptions
• Restarted WIA service
• Tested control panel and mobile scan
• Assigned static IP for network models
If all items are checked, your Brother scanner should work reliably.
Frequently Asked Questions About Brother Scanner Not Working
Why does my Brother scanner say “No devices found”?
This error typically means Windows cannot detect the scanner. Causes include driver issues, network disconnection, firewall blocking, or USB cable problems. Try reinstalling drivers, checking network connection, and verifying firewall exceptions.
Can I scan if my Brother scanner is not working on PC?
Yes. Use the Brother iPrint & Scan mobile app to scan from your phone or tablet. You can also try scanning directly from the scanner’s control panel using Scan to PC or Scan to File. If these work, the problem is PC-side.
How do I fix Error 48 on my Brother scanner?
Error 48 indicates the scanner module is not detected. Reconnect the USB cable or restart Wi-Fi connection. Reinstall the scanner driver. Test on another computer. If it still fails, the scanner hardware may be faulty.
Does Windows 11 cause Brother scanner issues?
Yes. Windows 11 updates frequently break Brother scanner drivers due to driver signing requirements and security changes. Always download the latest Full Driver Package from Brother’s official website rather than relying on Windows Update.
Why does my Brother scanner work for printing but not scanning?
This indicates the printer function works but the scanner function has a software or driver issue. Reinstall the scanner driver specifically, run Brother’s Scanner Driver Repair tool, and check that WIA and TWAIN drivers are properly registered.
How do I assign a static IP to my Brother scanner?
Access the scanner’s web interface by entering its IP address in a browser. Log in with admin credentials. Go to Network, then TCP/IP. Disable DHCP and assign a static IP outside your router’s DHCP range. Save and reboot the scanner.
Key Takeaways for Fixing Brother Scanner Not Working Issues
Most Brother scanner not working problems are software-related, not hardware faults. The most effective fixes are a clean driver reinstall using the Full Driver & Software Package from Brother’s official website, assigning a static IP address for network scanners, and running Brother’s built-in Scanner Driver Repair tool.
Always test scanning from the control panel first to determine whether the issue is hardware or PC-side. Use mobile scanning as both a diagnostic tool and backup when PC scanning fails. Keep firmware updated every 3 to 6 months and after major Windows updates.
For ongoing support, visit support.brother.com for free firmware updates, drivers, and repair tools specific to your model.
