Brother Error Print Unable E6 — What It Means & How to Fix It
Updated August 2026 · Independent PrinterCare USA support guide
The Brother Print Unable E6 error is frustrating because your printer appears to work fine until you actually send a document, then everything stops. This specific error code points to a failure in the main logic board's ability to process and store print data, which can happen suddenly even on well-maintained machines.
The good news is that E6 errors often fix themselves with basic troubleshooting, and you don't always need to call for service immediately. We've guided hundreds of Brother users through this exact problem, and most find relief within the first few steps below.
How to fix it — step by step
- Power cycle the printer completely. Turn off your Brother printer using the power button, then unplug the power cable from the wall outlet. Wait for a full two minutes while the machine is completely without power, which allows the main board capacitors to fully discharge. Plug the printer back in and power it on normally, then attempt a test print.
- Clear the print queue on your computer. On Windows 11, open Settings, go to Devices, then Printers and Scanners, find your Brother printer, and click it to open printer settings. Under the printer name, select Open queue, right-click any stuck jobs, and delete them. On macOS, go to System Settings, Printers and Scanners, select your Brother printer, and click the Options or Supply Levels button, then remove any pending jobs.
- Remove and reinsert the paper tray. Pull out the main paper tray completely from your Brother printer and inspect it for torn pieces of paper, dust, or foreign objects. Clean the tray interior with a dry cloth and check that the tray sensors are not blocked or damaged. Reinsert the tray firmly until you hear it click into place.
- Reset the printer to factory defaults. On most Brother models, press the Menu button on the control panel, navigate to Reset or Maintenance, and select Full Reset or Factory Reset. Confirm that you want to erase all settings and wait for the printer to restart completely. This clears corrupted settings from the main board memory without affecting the firmware itself.
- Download and reinstall the latest firmware. Visit the official Brother support website, enter your exact printer model number, and download the latest firmware file to your computer. Connect your printer via USB cable directly to your Windows or Mac machine, extract the firmware file, and follow the installation wizard exactly as written. Do not turn off the printer or disconnect the cable during the update, as interrupting this process can brick the main board.
- Check for loose internal connections. If you are comfortable opening your printer, power it off and unplug it, then remove the access panels to locate the main circuit board. Look for any loose ribbon cables, connector clips, or visibly burned components on the board. Gently reseat any loose connectors by pressing them firmly into their sockets, then reassemble and test.
- Test with a different USB cable and port. If your Brother printer connects via USB, try a different high-quality USB cable and plug it into a different port on your computer, preferably one directly on your motherboard rather than a hub. Reinstall or refresh the Brother printer drivers on your Windows or Mac system after switching the cable. Send another test print job to see if the connection issue was causing the E6 error.
- Arrange professional repair or main board replacement. If none of the above steps resolve the E6 error, the main circuit board likely has a hardware failure and needs professional diagnosis. Contact a certified Brother service center or an authorized repair shop to have the main board tested and replaced if necessary, which typically costs between $150 and $300 plus labor depending on your printer model.
Still stuck? We'll fix it for you — remotely, today.
A real technician connects to your computer securely, fixes the problem while you watch, and you pay only after your printer is working again.
Frequently asked questions
Does the E6 error mean my printer is permanently broken?
Not necessarily. Many E6 errors are temporary firmware glitches or corrupted data in the main board's temporary memory, which reset with a full power cycle or firmware reinstall. However, if the error persists after all troubleshooting steps, the main circuit board likely has a hardware defect that requires professional repair or replacement.
Can I still print anything while the E6 error is showing?
In most cases, no. The E6 error specifically indicates the main board cannot process any new print jobs, so your printer will reject all documents until the underlying issue is fixed. Attempting to force prints while E6 is active can cause additional damage to the main board logic.
Should I try to fix this myself or call a technician right away?
Start with the power cycle and firmware reinstall steps, as these have a high success rate and take less than thirty minutes total. If you are not comfortable opening your printer or downloading firmware files, contact a qualified Brother repair shop immediately, as incorrect firmware installation can permanently damage the main board.
What is the difference between E6 and other Brother printer error codes?
E6 specifically indicates a main board write failure, while other errors like E5 point to toner issues and E9 indicate paper feed problems. Only the E6 code means the main logic board itself cannot store or process data correctly, making it a more serious hardware-level problem than most other Brother errors.