Replaced toner cartridge and light stays on the printer will not

Try cleaning inside of printer where toner meets it.

How to Change a Toner Cart in a Brother HL 2040

The Brother HL 2040 laser printer has a toner cartridge that supplies toner to the drum assembly so that the printer can print properly. When the LED on the front of the printer indicates you are low on toner, you will need to replace the toner cartridge to maintain good print quality. Fortunately, the toner cartridge can be replaced without any special tools.

Instructions
Things You'll Need:

* Replacement toner cartridge (part number TN350 or TN360)
* Paper towel or scrap paper



Grasp the front cover of the printer and pull it toward you to open the toner door. Reach into the printer and grab the combined toner cartridge/drum assembly. Lift up slightly and pull it out of the front of the printer.

Place the cartridge and drum on a paper towel, spare sheet of paper, rag or other surface that can get dirty. Loose toner particles may spill from the cartridge.

Press the blue locking lever on the cartridge/drum unit to unlock the toner cartridge from the drum. Lift the toner cartridge up and away from the drum unit. Dispose of the old toner cartridge in accordance with your local regulations. Seal it in a plastic bag to keep loose toner from spilling.



Gently shake your new toner cartridge back and forth a few times to distribute the toner evenly across the width of the cartridge. Remove the plastic protective cover from the bottom of the cartridge.


Place the new toner cartridge onto the drum unit and press it down gently until it locks into place. The blue locking lever will automatically click into place. Verify that the toner cartridge is securely connected to the drum.


Locate the corona wire cleaner tab at the front of the drum unit. Slide it back and forth several times to improve the print quality of the drum. Set the tab back in the home position when finished.


Slide the combined toner cartridge/drum unit back into the printer and close the front cover.


Hope it helps...

Here you got bud just copy and paste all this **** below into the http:// window at the top of your web box:

http://docs.google.com/viewer?a=v&q=cache:uNJvw-MWncQJ:www.oasis-imaging.com/images/pdf/cart_inst/Brother%2520TN360.pdf+Brother+TN360+by+OASis&hl=en&gl=us&pid=bl&srcid=ADGEESj4M8XLUS4yMo7hAf3nTuGGvKtaYS5_tHhGdh9WoDGinffOkVJPv8cp642xaSG5PkbrNrcUssyMY1ggc1xYlSZEu-JNeY4iVcXWD9O7MKza5_7CjyQyTPW7nnZeAQWm_d7f-MEE&sig=AHIEtbTarYNPKakKRnVcXg3pW_PBoi_4tA

You gotta reset the plastic piece at the end. Also, get you some black electric tape and tape the 2 circular clear plastic plugs on each end of the cartridge. The sneaky bastards at Brother shoot a laser through these clear plastic plugs and when the toner goes below these plugs that causes your printer to say your out of toner even though your not. Therefore if you tape over these clear plugs, then you can squeeze another 225 pages of pure printing bliss without needing a replacement.

Open cartridge and then reset side white gear

Try this procedure as mentioned.if any mistake in trying the procedure then retry from first step again.so read it carefully and try it. Brother ML-2040 Toner Light Reset
When replacing the toner cartridge in the Brother HL-2040 with a new cartridge (compatible or remanufactured) the user may experience a problem with the toner light staying on, even with the new toner installed. The procedure below has worked for many folks, so give it a shot.
Open the front cover of the Brother HL-2040 and leave open while completing the following steps:
1.) Turn the printer off.
2.) Hold the ‘go’ button while turning the printer on. All panel lights should be on.
3.) Release the ‘go’ button once all lights are off.
4. )Press the ‘go’ button 2 times.
5.) Pause.
6.) Press the ‘go’ button 5 times.
7.) The toner light should be off.
8.) The paper light should be on.
9.) Close cover. The ready light should be the only light on.
Once all steps are successfully completed your “low toner” light should be fixed. ------------- From Brother Service Bulletin


1. Open the Front cover
2. Press and hold the GO button
3. Power ON the printer while continuing to hold the GO button
4. Once the 3 LED’s are lit, release the GO button
5. Press the GO button 2 times. This will cause the LED’s to light solid
6. With the LED’s lit solid, press the GO button 5 times
7. Toner Life End will then reset
8. Close the front cover. ----------- Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

There is a window on each end of the toner cartridge that you can cover with electrical tape and keep printing, it shines a light thru and when the toner is too low it says it's empty. The weight can be misleading.

If you replace a new toner and sitll not working then you should push and hold on start buttom for 1 min

Push the start buttom and hold for 30 sec.

You could try two ways.
1) reinstall the software.
2) push "start" buttom for 1 min

Dont recomend refills causes too many problems, like you are experencing, put in a real brother toner should fix problem.

great link to explain of lights on panel