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Brother MFC-7840W fax will not work

Bought 2 mo ago > Fax worked ok. Now. for a few days it received, but not sending> now it will not do either. Brother Model MFC-7840

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Plug a regular phone into the wall jack and listen for a dial tone.

Phone cord should be connected to the LINE port of the fax.

Do you have DSL?

Unplug power cord for 10 seconds.

Posted on Oct 18, 2008

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Mfc-7840w /Cc3 205 03031f04


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.

May 23, 2014 | Computers & Internet

1 Answer

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 open...you 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.

Dec 14, 2011 | Brother MFC 7840W Printer

1 Answer

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

http://www.retrevo.com/support/Brother-MFC-7840W-Multifunction-Printers-manual/id/16690ag611/t/2/

Mar 11, 2011 | Brother MFC 7840W Printer

1 Answer

My Brogher MFC-7840W is not printing any fax or sending any fax. When someone sends me a fax, it rings and then it goes dead. When I try to send a fax, it scans the document but then goes dead. I don't...


normally the only thing that could block you from sending a fax would be the connection to the phone line. make sure the phone wire is plugged into the line jack (not ext) and going straight to the wal, no splitters or extensions. if it still cannot send after this try another wire or jack

Mar 24, 2010 | Brother MFC 7840W Printer

1 Answer

Documents are smudged on brother mfc-7840w


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

Feb 03, 2010 | Brother MFC 7840W Printer

1 Answer

Our MFC 7840 printer when faxing keeps saying


Depending on your location the line coulod well be poor quality for a sensitive fax. Any spurious sounds on a fax line will cause it to fault.
May I suggest you try the fax on the mainline first before assuming the unit is at fault.

Length of line from point a to b can also reduce the efficiency of signal. It may sound ok to the ear, but resistance may be the factor in reducing the level of the tone that the fax requires to hear and then activate send or receive.It reports poor line condition and even poor memory because it keeps loading to send.

If it does it on the mainline as well then I would be considering a technical call for help. There may be a fault in the unit.

please rwte my help++++Thanks for using FIXYA

Nov 24, 2009 | Brother MFC 7840W Printer

6 Answers

Using MagicJack for faxing; however, Brother MFC 290C is stating poor line condition - why? Also say's low ink Magenta - would that create this problem?


I had the same problem trying to send out faxes out using my Brother MFC 7340. I use a magic jack phone line. Page 106 of the user manual says if sending via VOIP phone line, you should press menu, then 2, 0, 1 to select "Basic (for VOIP) mode. Then press ok. Then press stop/exit. This cuts the modem speed down to 9600 bps and turns ECM off. Then retry to send the fax. I did that and can now send and receive faxes.

Jun 06, 2009 | Brother MFC 420CN All-In-One InkJet...

1 Answer

MFC 7840W, fax not sending or receiving


Is your phone line DIGITAL? Fax machines are ANALOG devices.

Jan 15, 2009 | Brother MFC 7840W Printer

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