Question about Brother MFC 7840W Printer

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We replaced the toner and it is still saying "toner life end replace toner cartridge." and we can't get it to print or fax or copy

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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.

Posted on Jan 28, 2012

  • vgnair2004 May 12, 2013

    Thank you very much, this works for MFC-7860DW printer too. My page count was 547 when this message appeared.

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  • Brother Master
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Hello sir; I believed you bought one is recycle one, on the cartridge there have a memory chip just remove it will be OK.

Posted on Jun 23, 2009

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Related Questions:

2 Answers

Drum Life Ends soon - Brother


The problem with this is the design. Each toner cartridge has a microchip on it, that counts the pages you print. The company has determined that you get x amounts of prints. Then you have to replace it, empty or not. This printers do not work the same way as an expensive professional business copier. In an pro style there is a spent toner cartridge that collects all of the wasted toner that is on the drum. On a small business/home style this spent toner goes back into the cartridge. There is no level indicator, even on the inkjet printer. They too, have a chip that says you have x amount of prints/cleaning cycles they can go through. Look up inkjet refill kits or inkjet cartridge programmer.

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1 Answer

I change the drum for my fax machine, but it still says Toner Life End... and it is a bran new cartridge?? I tried turning it off and on, and unplugging it... but it still says Toner Life End... how do i...


1. With unit powered On, open the front cover.


2. Press the "Options" key. Display will show "Replace Drum?"


3. Press "Start" key.


4. Press 1,0 .


5. Display will show "Accepted" for approximately 2 seconds. Then display will change to "Cover Open".


6. Close cover and see if Toner Life End error message has gone.

Good Luck and Thank You for using Fixya.

Jan 08, 2011 | Brother IntelliFax-2820 Laser Fax

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I replaced already new toner cartridge for my brother fax machine mfc-7220 but still the on screen message is appearing on the display "TONER LIFE END". Pls help me to solve this problem. Tnx and God bless...


I replaced already new toner cartridge for my brother fax machine mfc-2820 but still the on screen message is appearing on the display "TONER LIFE END".
Pls help me to solve this problem.

Apr 12, 2010 | Panasonic KX-FL541 Plain Paper Laser Fax

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Toner Life has ended


Did you pull the plastic tape on the cartridge?

Feb 11, 2010 | Brother IntelliFax-2820 Laser Fax

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Said low toner cartridge. Replaced cartridge,


what is showing toner life end ? rajcanon007@yahoo.co.in

Sep 14, 2009 | Brother IntelliFax-2820 Laser Fax

1 Answer

Had toner life end message. Replaced toner and drum with oem,machine reset but now just making blank copies. Tried to print internal report that's blank too


To reset the sensor after installing a new toner cartridge follow these steps.
1. With unit powered On, open the front cover.
2. Press the "Options" key. Display will show "Replace Drum?"
3. Press "Start" key.
4. Press 1,0 .
5. Display will show "Accepted" for approximately 2 seconds. Then display will change to "Cover Open".
6. Close cover and see if Toner Life End error message has gone.
Please note that this must be done with a new cartridge so the unit will see that there is toner in the cartridge.

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Toner life end


There is no reset code the likely thing is that you have a faulty toner cartridge. Put another new one in and check the machine then.

Before you try the above shake the toner cartridge and tap it some more as it may also be the toner inside have become solid and needs breaking up.


Hope one of the above works for you
Thanks J

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Brother dcp 7020 says toner end life


unplug plug it back in, did you remove the protective cover and clean coria wire?
http://welcome.solutions.brother.com/BSC/public/us/us/en/faq/faq/000000/000000/000065/faq000065_018.html?reg=us&c=us&lang=en&prod=dcp7020_us

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