When your Brother MFC-L9570CDW is not responding, it can bring your entire office workflow to a halt. This high-capacity color laser all-in-one is built for heavy-duty business use, but like any complex device, it can freeze, hang, or become completely unresponsive due to firmware glitches, network communication failures, hardware conflicts, or corrupted print jobs. Whether your control panel is frozen, the printer won't wake from sleep mode, or it simply ignores all print commands, this troubleshooting guide will walk you through proven printer repair solutions to restore full functionality.
Quick Fixes to Try First
Before diving into deeper troubleshooting, these initial steps resolve many cases where the Brother MFC-L9570CDW is not responding. Start here to save time and avoid unnecessary printer support calls.
1
Perform a Hard Power Reset: Unplug the power cord from the rear of the MFC-L9570CDW, then disconnect it from the wall outlet. Wait at least 60 seconds—this allows the internal power supply to fully discharge and clears temporary memory corruption. Plug directly into a wall outlet (avoid surge protectors or power strips, which can cause voltage issues). Power on and check if the touchscreen responds.
2
Clear the Print Queue on Your Computer: A corrupted print job can cause the printer to hang indefinitely. On Windows, open Services (type "services.msc" in Run), locate "Print Spooler," right-click and select "Stop." Navigate to C:\Windows\System32\spool\PRINTERS and delete all files inside. Return to Services, restart the Print Spooler, and attempt to print a test page. On Mac, go to System Preferences > Printers & Scanners, right-click the MFC-L9570CDW, and select "Reset printing system."
3
Check the Touchscreen for Freeze Recovery: If the 7-inch color touchscreen is frozen but the printer has power, press and hold the power button for 15-20 seconds until the device shuts down completely. This forces a system shutdown rather than sleep mode. Wait 30 seconds, then power back on. The MFC-L9570CDW should run through its full startup sequence, which can take 2-3 minutes.
Advanced Troubleshooting Steps
If basic steps don't fix your Brother MFC-L9570CDW not responding, these deeper troubleshooting methods address network, firmware, and hardware-level problems that prevent normal operation.
4
Verify Network Connectivity and IP Configuration: Network misconfiguration is a leading cause of unresponsiveness in business printers. On the control panel, press Menu > Network > TCP/IP > IP Address to confirm the printer has a valid IP (not 0.0.0.0 or 169.254.x.x). If using DHCP, try setting a static IP to prevent address conflicts. Ping the printer from your computer: open Command Prompt and type "ping [printer IP address]." If ping fails, restart your router and reconfigure wireless settings via Menu > Network > WLAN > Setup Wizard.
5
Update or Reinstall Firmware: Outdated firmware frequently causes the MFC-L9570CDW to become unresponsive during complex print jobs. Visit Brother's support site and download the latest firmware for your specific serial number range. Transfer the file to a USB flash drive formatted as FAT32. Insert the drive into the front USB port, navigate to Menu > Machine Info. > Firmware Update, and follow the on-screen prompts. Never power off during a firmware update—this can brick the device.
6
Test in Safe Mode and Check for Hardware Faults: Boot the printer with minimal hardware attached: remove all paper from trays, open the front cover and remove toner cartridges and drum units, then close covers. Power on—if the printer responds and shows "No Toner" or similar, the control board is functional. Reinstall components one by one, testing after each, to isolate a faulty toner, drum, or paper sensor. A failing fuser unit (indicated by Error Code E50, E51, or E52) can also cause complete unresponsiveness and requires professional printer repair.
⚠️ Important: Do not attempt to disassemble the MFC-L9570CDW beyond removing user-serviceable components (toner, drum, paper trays). The fuser operates at approximately 200°C (392°F) and can cause severe burns. Internal power supply capacitors retain hazardous voltage even when unplugged. For internal hardware faults, contact certified printer support technicians.
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Why does my Brother MFC-L9570CDW keep becoming unresponsive after sitting idle?
This typically indicates an aggressive power-saving setting or outdated firmware. Navigate to Menu > General Setup > Ecology > Sleep Time and increase the value from the default 3 minutes to 10 minutes or more. Also disable Deep Sleep Mode if network printing is critical, as this feature can cause delayed wake-up failures with certain router configurations. Updating to the latest firmware often resolves sleep-related responsiveness bugs.
Can a full memory buffer cause the MFC-L9570CDW to stop responding?
Yes. This model has 512MB standard memory (expandable to 1GB), but extremely large print jobs with complex graphics can overwhelm available RAM. When the memory is saturated, the printer may hang without error messages. To fix this, cancel all jobs from the control panel (press Job Cancel if responsive, or power cycle if frozen), then reduce print resolution from 1200x1200 to 600x600 DPI in your print driver. Consider adding the optional 512MB memory expansion (SO-DIMM DDR3) for high-volume graphic-intensive workflows.
How do I know if my Brother MFC-L9570CDW needs professional tech support versus DIY troubleshooting?
If you've completed all steps in this guide—including hard reset, queue clearing, network verification, firmware update, and hardware isolation—and the printer remains completely unresponsive with no display backlight or fan activity, you likely have a failed main board, power supply, or formatter board. Similarly, if the printer displays Error Code E54 (main motor failure), E60 (fuser error), or DF (duplex fan error), these require specialized diagnostic equipment and replacement parts. Professional fix printer services can accurately diagnose and repair these faults with genuine Brother components.