Question about Brother MFC 7420 All-In-One Laser Printer

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Brother MFC 7420 won't turn on

I had a bad paper jam and had to go through the back as directed in the manual. I pushed down on the black tab to pull out the paper - there is a now a spring that doesn't appear to be attached to anything on the right hand side in back that looks like it should set against the black plastic thing with the hot warning signs on it. Now when I putt it all back together it won't turn on, it is dead. What did I do wrong??.

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All you need do is press the blue release button up and down on the left beneath the heat warning sign and it should come on, unless something else is damaged.

Posted on Mar 31, 2010

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Its the sensor which has came out and without fitting it the prinyter will not start. technical help at your place is vbrymuch necessary at present.

Posted on Dec 15, 2008

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1 Answer

Paper jams brother mfc 7420


Paper Jams are routinely caused by bad roller in the printer. The Heat of laser printers can render these rubber roller pretty useless in a couple of years or less if you print often. If you have recently replaced the drum (according to the recommended print output number), Then If an $80 dollar roller + labor is worth it to you, go for it, otherwise buy a new printer and Brother gives the best ink value per page. hope this helps.

Jan 28, 2013 | Brother MFC 7420 All-In-One Laser Printer

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My Brother MFC-7420 Printer always prints black lines and splotches down the left side of my paper. This happens whether I'm scanning or printing from my PC. When I looked at my drum, it appears a


If you are seeing vertical streaks/black lines your primary corona wire is dirty and or the fax scanner may be dirty.
1)To clean the corona wire you take the drum unit and toner cartridge and place it on disposable paper to avoid spilling.
2) Clean the primary corona wire inside the drum unit by sliding the blue tab from right to left several times.
3) Return the blue tab and snap it into the home position.
4) Reinstall the drum unit and toner cartridge.
5) Close the front cover.
Caution: if you do not return the blue tab to the home position it may repeat the black lines.

Nov 29, 2012 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

I have a brother mfc 7420 and every time I print it tells me paper jam, I pull the paper tray out fix the paper push start it tells me paper then I have to pull out the cartridge and pull out the paper...


Sounds like there is something in the paper track that's causing this to jam. Its not always easy to get small particles cleared just by removing the jammed paper.

This may not help everyone that I send it to, but it is worth a try.
I suggest you get a sheet of Card Stock (Heavy paper) and place it in the feed way. Then press
the print button applying a slight amount of pressure on the Card Stock so it will feed through the printer.
The reason for this is in some cases I have been able to clear the paper track of debris that was deposited there over time.
Worth a try, as I have fixed a number of printers this way, saving costly repairs.
Hope this helps. Bud

Sep 20, 2010 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

PAPER JAM MESSAGE APPEARS WHEN THERE IS NO PAPER JAM


Please follow the directions below to clear the paper jam error orincase there is one somewhere.

Turn off the Printer. Remove the drum and toner from the front cover. Remove the toner from the drum. Look inside machine incase of possible paper jam. Open back cover and paper tray incase of jam. Close all doors and put toner and drum back in machine. Turn on the printer, and see if the error message is gone.

Apr 04, 2010 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Brother MFC 7420 keeps saying - back cover open - close thre back cover? How do I reset the printer orf find the underlying fault?


First be sure you close the back cover and remove all the jammed paper. after that, turn off your printer for 1 min to see is it okie.

Jun 10, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Paper jams 1/2 way through drum/cartridge. Jams like an accordian, with 1/2 page printed. My printer is a Brother mfc 7420. About 2 years old.


Take the toner cartrige out, look around with a flashlight for a piece of paper or something that could jam the works. Check the movable tab that comes out of the front of the machine to hold paper up, maybe it has gotten crooked or something. Don't have anything in front of the machine to block the paper coming out. A can of compressed air can be used to blow the machine out.

Apr 12, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

MFC 7420 front paper jam


First you need to clean up your printer with duster and after thatn, check the toner and drum to see any paper jam or anything wrong,
Normally after you clean up the machine, should working fine,
if still not working, please replace the rubber roll.

Apr 06, 2009 | Brother MFC-7420 Printer

2 Answers

Message on brother MFC7420 "back door open" when it's not


Actually, you need to double check the back cover and front cover, open them all to check all paper jam.
Besure to check the back cover, normally all paper jam is from the back.
be sure to close the front cover at the last cover to close.

Apr 01, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Paper jam lcd won't turn off


pull your drum unit out and look at the bottom of it. you'll see an open slot in the center. make sure no piece of paper is caught up in it. if thats not it, open rear of machine and look fpr your black sensor lever. make sure it moves down and springs back into position by manually pressing it down.

hth,
razors

Jan 09, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

I have a Brother MFC 7420 with a bad paper jam in the back


white knight to the rescue. the back door is quitew tight to open. pull it open with a firm **** of the hand.there you will see the paper jam. pull the paper out slowly as not to break the paper sensor in the back. let me know how it went. brother tech

Dec 10, 2008 | Brother MFC 7420 All-In-One Laser Printer

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