Question about Brother MFC 7840W Printer

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"brother mfc 7840w printer goes offline and i cannot print need turn printer on and off.

"brother mfc 7840w printer goes offline" Problem

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  • admin236 Apr 23, 2009

    Same problem here. It will remain offline to all machines on the network, wired or wireless. Faxes also refuse to receive after the machine's been on for a few minutes, forcing us to continually power-cycle. The machine is less than a week old!

  • Anonymous May 16, 2009

    For the first two months, my wireless printer worked beautifully, now it is offline and i have no idea how to repair it. I deleted it and reinstalled and i get the same problem. 

  • Anonymous Mar 15, 2014

    brother mfc 7840W will not connect to router

  • Anonymous Mar 20, 2014

    how do i connect wireless to a mfc-7840w



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The solution, and it took me a long time to find the simple solution, is to right click on your printer, click properties, click the ports tab and click on your Brother printer and click on configure port (or you can delete the existing one and then add another one). What you want to do is update the IP Address. The problem is that the printer does not have a static IP address, it is dynamic. If you want to confirm that, go to your printer and press the reports button and print out the network configuration report. Your IP address will show on that. It's really the last digit in the IP address that changes. This will absolutely solve your problem. Good Luck!

Posted on May 17, 2009

  • Dede12345 Mar 10, 2011

    after i print out the report how do i change the IP address for the printer?


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Dmarciante is absolutely right, sometimes the IP address changes. However, here is another reason you may see the printer as off line, you move around your laptop to different network (for example from home to office network). To see if this is your issue, right click on the printer (from the Printers and Faxes window for example) and see if you have a menu option that says "Use Printer Online". If so just click on that option and you are done. If this fails try the IP address resolution. See the image below...

Posted on Sep 21, 2010

    THOMAS FERRELL Jun 12, 2014

    my WIN8.1 returns "CONFIGURE PORT is NOT supported"! what do I try now?



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1 Answer

Printer offline

Try disconnecting the printer completely from power and from the PC.
Leave it as such for one hour.
Connect the printer again.
Check the connections and make sure its well connected.

Feb 24, 2012 | Brother MFC 7840W Printer

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The Brother MFC-7840W printer was installed on a USB connection. The printer worked the previous week albeit not for all applications but at least for the Vista word program. Now it doesn't respond to...

Hi there!
You can check if the usb cable is connected directly & securely from printer to your computer. Once it's verified. The display of your printer should show the date/time.
Since the printer is displaying offline you can open Control Panel, go to Printers folder right click on the printer icon and select 'Use printer online' If you have pending documents right click on the printer icon and click on cancel documents.
Try checking for a duplicate copy of your printer driver or check which printer driver is selected as the default and has the status ready.
Right click on the printer driver that has a Ready status click on printing preferences and click on print a test page.
Hope this helps! Vikroks

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Brother has posted a Network Connection Repair Tool on their site under downloads. Worked great to put my MFC printer back on line with my network.

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You need to use the manual feed, which is above the tray and open the back cover when printing envelopes.

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just clean the toner and try.
Have a nice day and do not forget to rate please...!

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