Question about Brother MFC 7840W Printer

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Reset mfc 7840w - Brother MFC 7840W Printer

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  • Master
  • 2,306 Answers

Depends on the error, some you can clear by holding the stop or cancel button while you power on the machine. Need to read the error on the LCD to do the right reset.

Posted on Jul 02, 2009

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Posted on Jan 02, 2017

  • 265 Answers

SOURCE: How do you reset a Brother MFC-7840W printer to

Menu * 2864 (within 2 sec.), 0,1, when 'maintenance' appears, press 0,9 to exit.

Posted on Dec 11, 2009

  • 7 Answers

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

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

  • 59 Answers

SOURCE: how do I reset the drum counter on the a Brother

open the front cover of the machine then press clear back it will say replace drum? press ok
the quality will probably start getting pretty bad as you will be using the drum passed it's life

Posted on Mar 24, 2010

Jimsta01
  • 405 Answers

SOURCE: how do I reset the drum counter on the a Brother

open the front cover of machine ( where the cartridge is installed), then press the clear button, and then press 1 for yes for change drum question.

Posted on May 16, 2010

djgillstudio
  • 107 Answers

SOURCE: how do i reset drum

hello, i am going to ball park this, with machine on, open up front cover as if you are going to replace toner, press the clear button, on the display it may say, new drum press 1 for yes 2 for no, then close front cover. normally the drum comes with the instructions on this, but sometimes its missing, but also brothers web site has the info on this. i work on these alot so most of the resets are the same

Posted on Oct 08, 2010

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1 Answer

How do you reset counter on Toner for TN-360


No, If you use a refill in your recent toner cartridge you need to reset the toner, if you use a new toner cartridge, no need to reset.

Aug 28, 2014 | Brother MFC 7840W Printer

2 Answers

Where do you find corona wires on Brother 7840W printer?


The wire is on the drum (where the toner cartridge fits in). The green or blue piece slide cleans the coroner wire.

Jul 23, 2014 | Brother MFC 7840W Printer

1 Answer

Brother mfc-7840w wont send or recive faxs, but can do everything else?


You need to reset the baud rate. Mine did the same thing but now works fine!

Jan 18, 2011 | Brother MFC 7840W Printer

1 Answer

How do i reset drum unit life counter on the mfc 7840w


hello, i am going to ball park this, with machine on, open up front cover as if you are going to replace toner, press the clear button, on the display it may say, new drum press 1 for yes 2 for no, then close front cover. normally the drum comes with the instructions on this, but sometimes its missing, but also brothers web site has the info on this. i work on these alot so most of the resets are the same

Oct 08, 2010 | Brother MFC 7840W Printer

1 Answer

Drum error message


To reset MFC-7840W drum count use the following steps.

1. open the front cover (leave open).
2. Press clear/back.
3. Then confirm the new drum install by pressing 1.
4. The display will indicate accepted.
5. Then close the front cover.

This should be done each time the drum unit is replaced.

Jun 18, 2010 | Brother MFC 7840W Printer

1 Answer

How do I reset the drum counter on the a Brother MFC-7840W???


open the front cover of machine ( where the cartridge is installed), then press the clear button, and then press 1 for yes for change drum question.

May 13, 2010 | Brother MFC 7840W Printer

1 Answer

My brother mfc-7840w printer keeps telling saying there is a drum error and will not print. i clean the corona wire and reset everything yet the same thing happens again and again. how do i fix this?


The drum is the photosensitive roller that the image is charged onto so I'm afraid cleaning the corona wire won't help. If the drum is removeable try reseating it, otherwise it looks like you may need to buy a new drum kit for it.

Apr 28, 2010 | Brother MFC 7840W Printer

2 Answers

I replaced the toner for MFC 7840W and I am still gettin the toner life end message, I can not print. Please help


As noted from a previous poster, this one works!

I have a brother mfc 7840w

I first used the electrical tape trick and that worked for a while. Then got the toner low message again. I then tried the *00 trick, which works as follows:

1. lift lid and open front cover
2. press clear/back. "Replace Drum?" will appear on the screen.
3. Press "*00" it will then read accepted and the toner low error (End of Toner Life) should go away.
4. close it all up and your done.

Thanks for all your help guys.

Jan 18, 2010 | Brother MFC 7840W Printer

2 Answers

How do you reset a Brother MFC-7840W printer to factory default settings?


Menu * 2864 (within 2 sec.), 0,1, when 'maintenance' appears, press 0,9 to exit.

Dec 08, 2009 | Brother MFC 7840W Printer

3 Answers

Problem with our Brother mfc-7840w toner all over the page


since i finally figured this out I thought I would post this for anyone who has the
HL-4040 CN printer - or one similar
After seeing the hitting the buttons with the door open tricks for different models I tried anything that sounded like it had the same buttons my 4040 has... nothing on here worked so I just started hitting combinations of buttons with the door open - wow there are quite a few hidden menus there
For the toner life reset menu:
1 Open the front cover of the printer
2 press and hold the cancel button
3 press the reprint button while still holding cancel
- here is the reset menu - go to the appropriate cartridge on
- the menu and reset it and you're done!
FYI... Pressing the "Go" button and the up arrow gives you the parts life reset menu (drum, laser, fuser, etc.)
I also did the electric tape over the windows - which worked before the reset - but I thought this fact would be helpful too.
For anyone that is asking "what window?" I think it is the clear plastic opening on the sides of the cartridges where you can actually see the powder inside the cartridge - the color of the toner (magenta, yellow, or cyan). I didnt really know that for sure when I tried, but it made sense, and it worked. So I am fairly sure that is the "window" you should be trying to cover.
you can go here for more update: https://www.microtonersupplies.com.au/toner/brother-toner-catridges

Sep 03, 2009 | Brother MFC 7840W Printer

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