Installed new cartridge and comming up machine won't regognise it saying tonner life end install new cartridge

There is a reset gear in the cartridge that needs to be "reset" or replaced. I've included a link to a PDF file that goes over the procedure to properly refill and reset the toner cartridge. This is a document that is used by a company that does a complete rebuild, so you probably won't need most of the information, just the part on resetting the reset gear.

http://www.uninetimaging.com/downloads/technical/TecArtWebAdded/Brother_HL_5300_Series_tn650_Reman_Eng.pdf

The toner cartridge in this machine has a gear assembly that resetting the "toner empty" light, it is build in a way that after resetting the printer it "disabling" the gear, so no second reset is possible. If you install the new cartridge previously and took it out it already run the reset cycle and will not be able to reset the printer even if it full with toner. Some time the gear reset system will not reset even if it is new. If you reset the gear and the light comes back your cartridge is empty.
You can open the gear cover on the toner cartridge and reset the gear to the original position it is not a big deal, but don't hold me liable to your technical ability. The reset gear is the most right gear behind the "window" on the right side of the cover, when you are holding the cartridge with the gear housing in front of you. Good luck.

I know how to solve drum end problem along with change tonner.... Send me mail on [email protected]... Thanks

As posted by another before. Remove toner cartridge and cover small window in RHS with opaque tape eg black gaffer tape.

If you open the front cover of your printer where you install the toner cartridge and press the "Clear/Back" button with it open, an option comes up on your LCD Display that says "Replace Drum?" press 1 to reset it. That should fix your problem!

Open the front cover
Press the OPTIONS button
Press the START button
Press the number 1 key twice
Close the front cover.

You may need to go through the steps above twice to reset the toner.

Here is the solution that will reset the count and allow your fully functional toner cartridge (the one the printer tells you is empty) to continue to work.

Open the front cover.
Press options button.
Press the start button.
Press + or up arrow button 10 times.
Press set button.

You have to do this with a long pause or the system will reset and you will have to start over.

Good luck.

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.

This is a common problem. You need to be sure that the toner and drum unit are seated correctly. I assume you. You may also want to try a different toner in case the chip is bad on it.

The following has been known to work also. Open front cover leaving the toner cartridge and drum unit in.
Press the Options button,
When "Replace Drum?" comes up quickly press the Start button.
Immediately press the "1" and "0" button. The display will say "Accepted" and the error will go away.
You need to this these pretty quickly.