Question about Brother Office Equipment & Supplies

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Fax doesn't work only states machine is a sleep,doesn't fax or receive fax. Model MFC-7840W does print between laptop and printer. or

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  • mcjeff Dec 17, 2008

    I will know the next time I have to fax something.



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Are you in power saver mode? is it a wired or wireless machine? you could try running the setup disk, if you are in wireless it should straighten out the problem. Power it up and try reinstalling. Wire it to the laptop and run the setup, it will let you know when you can remove the wire, thanks and good luck,Gym .

Posted on Dec 17, 2008

  • George Bill
    George Bill Dec 18, 2008

    Ok see now it makes sense, go into control panel, than power options and the change the power off and other options so that the computer doesn't go into sleep mode. Always on. you can still have your screen saver go on after 30 minutes or whatever time frame you like. Disable hibernation, and you should be ok, the machine was going to sleep, and not alowing the fax to work.


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Its the setting error the printer is not set on fax mode.just make it set and then check out.or either the wires of fax line are loose or gone faulty so this problem.

Posted on Dec 17, 2008

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Unplug machine for 5 minutes and this should reset your uniy!

Posted on Dec 17, 2008

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Your fax machine can work independently from your operating system. Print the document and try to manually fax from the fax machine. See if there is an error message on the fax when you try. Then if it doesn't work , post the new error from the fax machine.

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Brother mfc-7840w won't receive fax

The first thing that I would try multiple people to ask them to fax you.Sometimes the 2 machines don't "sync".This is a toll free fax test number that I always use to check my machines..1-888-473-2963.Just write the words "FAX TEST" in large letters on a blank sheet of paper..fax it to that number...leave the line should get a fax back in about a minute.If you get a fax back...your machine is fine...let me know if this was helpful....thanks.

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I'm not very techie... I just want to ask how to use the fax in this model... is it plug and play? how to operate the fax? can i operate the fax through computer? can i receive fax? will my fax number be...

Here in the link which i have given you could find your printers manual download it and so that you can see about your fax how to use

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MFC-7840w printer, how do i take it off sleep mode?

  • The control panel features a series of buttons as well as an LED "Status" screen.

  • Press the "MENU" button. Go to INITIAL SETUP, select "FAX" select "RECEIVE MODE" change to F/T
  • If you are using the Brother on a line by itself, set it to "Fax." If you are using the Brother on a line that also shares a telephone, set it to "Fax/Telephone." If you are using the Brother IntelliFax along with ananswering machine, set it to "TAD." Once you set your IntelliFax to the appropriate mode, the unit will leave "Sleep" mode and be ready for use.
  • Select "GENERAL SETUP" go to "ECOLOGY" and #2 is SLEEP TIME = adjust to 60 sec. This keeps the machine from becoming idle/sleep mode for a longer period.

    Sep 25, 2010 | Office Equipment & Supplies

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    From the Brother web site.

    Description of Problem 100000018247
    When I launch PC-Fax Receive Program, I receive an error stating: The Fax Receive program must be started to receive PC faxes. What can I do?pc fax rx

    Description of Solution 200000023257
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