How do I replace the drum on a Brother hl 2040.

if your drum is new and still you are getting a problem of dark background then you have to replace the toner cartridge.

CHANGE DR. BLADE OF YOUR CARTRIDGE.

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...

if you want to replace your toner,
First you just need to open your front cover and pull out the toner and drum.
after that, push down the blue buttom on drum and pull out the toner. Then replace the new toner into the drum.
finally, just push back the drum and toner back into the printer.

does the problem exist if you try your old cartridge (just for a test)? if it doesn't, then you have a defective toner. Otherwise it is coincidental, and you need to replace the Drum unit.

Where Can I download installation software for Brother HL-2040 printer

It should be one unit??? look at the toner cartridge and look for a shiny cylinder that is the drum.

you can google brother hl2040 drum and click on images on the top right of google to see what it looks like

I was trying to put it in the wrong side of the printer!

this is the problem of scanner assebbly (lense section), So open this section & clean the scanner after that your printer will work properly.