Replaced toner cartridge now doesn't work

Not sure what you mean by "licking sound during startup"

As for the Toner not reading most often this is caused by the toner cartridge being empty. Try replacing your toner cartridge. If you have recently changed the cartridge it may not have triggered the Toner Reset microswitch. The reset gears on the side of the cartridge will need to be changed back to the ready position. If it is an OEM cartridge then take it back to the place you bought it from and they can replace it and send it back to brother. If it is a remanufactured cartridge then take it back to where you got it from and they can reposition the gears for you.

Not reading the paper can be because there is no paper in the machine or the paper feed system is worn and needs to be replaced.

Open front cover and pull out the toner cartridge with drum unit. To release toner cartridge from drum unit just push blue lever down and lift up toner cartridge.

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...

Open cartridge and then reset side white gear

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.

how do i set the toner reset lever on a brother hl 5250 printer

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

are you using generic toner or brother toner?????

Push the start buttom and hold for 30 sec.

where they refilled or third party cartridges? If so try a name brand. It could be the high voltage board or the laser aperture
could be dirty.