Question about Brother MFC 420CN All-In-One InkJet Printer

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Brother MFC-420CN keeps showing Unable to Print w full ink

My Brother MFC-420CN keeps showing Unable to Print after I have replaced all 4 inks. Ink vol are full. ???

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I often have the same problem - The inks being put into the printer are seated very sensitively. The lever holding them in may be also acting as a pressure sensitive switch because when I wiggle it a little, the printer usually starts working again! Make sure the cartridges are pressed STRAIGHT DOWN, wiggle them and wiggle the plastic pressure lever. (I do not know what else to call it!) and I hope yours works again. It is a great little printer, but this is really annoying! Good luck!
BTW, if your inks are RE-FILLED, that may be your problem. It seems they are made to NOT be refilled. To avoid this problem, do not wait till they are empty to refill them. Check them monthly (depends on usage) and when they get 1/2 way, refill then. Do NOT put the hypodermic refilling tube in deeper than necessary to refill. I use a heated nail to make my hole in the plastic, going ONLY in as far as necessary to make the hole, and then I cover it with scotch tape. Then I wash off my hands with Lava soap! (Haven't mastered the knack of not getting the ink on myself, yet!)

Posted on Apr 27, 2010

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Brother 420CN printer will not print black ink. Have replaced the cartridge and after several cleaning cycles, it still will not print properly. Test Print shows colors are fine but black ink is hit and...


I have a brother MFC 3240C. My Black ink stopped printing(initially printed horizontal faded lines and gradually got worse), the other colors were printing fine. I tried cleaning numerous time( 50 -100 times over 1-2 weeks ). Still no improvement. The way I print now is:
1. I go to Printer Properties
2. Change Media type from "Plain Paper" to "Inkjet Paper".
3. Change Quality to "Photo".

This takes a long time to print 1-2 minutes per page. However, this works for me since this is my Home printer and use it for printing only few pages here are there.

Good Luck
RK

Dec 20, 2009 | Brother MFC 420CN All-In-One InkJet...

3 Answers

MFC-420CN error "Unable to Clean"


Unable to clean comes up as well when the ink absorber is full. It won't let you print or
clean until a fresh absorber is installed, as it could leak all over inside and out. A shop has to do the repair.

Jul 10, 2009 | Brother MFC 420CN All-In-One InkJet...

1 Answer

The black ink will not print on my Brother 420CN


Get a new printer. What probably happened, is that your printer went dry, meaning there was no ink left, and that wrecked the printing heads.

Jan 12, 2009 | Brother MFC 420CN All-In-One InkJet...

1 Answer

Is there a waste ink absorber on a Brother MFC 420CN?


MFC420CN waste ink absorber how do you replace it or clean it ?

Dec 18, 2008 | Brother MFC-9420CN All-In-One Laser...

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How to Override Ink Level Gauge When Using Refilled Cartridges


Above link great.
If you have a newer print cartridge cart, look for the little window. I put a sticker over the little window on the Brother (innobella) LC38 cartridge cart and it worked great :)
Despite finding a fix for this problem, I think this is a rip off setting on the brother printers and I will never buy another Brother printer for this reason.

Jul 04, 2008 | Brother MFC 420CN All-In-One InkJet...

1 Answer

Brother mfc 420 cn does not print red color


do you use generic ink? If yes, the generic ink might have clogged the ph (valve stucks inside because of lack of additives!).

Anyway, do this:
(use near full level ink carts!)
make sure carts are placed well and are secured.
Press menue then start bk copy then fortimes arrow up. machine will be in maintenance mode. press 7 then 6 then 4 then start bk copy. machine will refresh ink in tubes and ph and do some cleaning cycles. when finished press 7 then 6 then 3 then start bk copy. ,achine runs a power purge. when fisihed press 9 then 9 to leave the mode. press ink etc. to run a quality test print.
If you still cant see any magenta, the ph is defective and needs replacing!

Dec 19, 2007 | Brother MFC 420CN All-In-One InkJet...

2 Answers

Brother MFC-420CN color ink empty but want to print/copy in B&W


brother won't print od do anything is one of the 4 inks are empty so first of all you have to replace whatever is empty, when you remove it it will ask you if you changed it and if it is a new one you will press 1 twice per cartridge, if you put compatible ink in you will clog the ink head up and then be stuffed

Dec 15, 2007 | Brother MFC 420CN All-In-One InkJet...

1 Answer

Brother MFC-420CN All-In-One


unplug maqchine from power. take all carts out. wait 5 minutes. connect machine to power. insert carts as demanded. give the right answer if machine asks if the carts are changed. machine will do some cleaning.

do you use generic ink? in that case you might have clogged the printhead with wrong ink. The ph cant be cleaned anymore.

nevertheless try this (carts should be nearly full!):
press menue then start mono (blue copy) then fourtimes arrow up. machine will be in maintenance mode. press 7 then 6 then 4. Machine will display init_all. press start mono. machine will refill tubes and
ph with fresh ink and do some cleaning. after that press 7 then 6 then 3 and start mono. machine will do a powerpurge.
press zero then 9 to do a quality test print. If it cant do the job leave maintenance by pressing 9 then 9. do the test print manually by pressing ink etc.

If you still do not see any colors the ph is clogged and cant be fixed anymore. It has to be replaced.

Dec 03, 2007 | Brother MFC 420CN All-In-One InkJet...

1 Answer

Print problem


The yellow one first:
http://www.fixya.com/support/t276232-cartridge_not_recognized

For the BK one:
make sure that all carts are placed well and are secured.
Press menu then start mono (blue button) then fourtimes arrow-up (tel-index). machine will be in maintenance mode. press 7 then 6 then 4 then start mono. machine will initialize the carts and refresh the ink within the tubes and the ph. It does some cleaning too. Leave maintenance afterwards by pressing 9 then 9. Run a quality test print by pressing ink etc.

If you still have trouble with bk this part of the ph is clogged due to generic ink (pigments).
BTW the nozzles have a micro filter infront. generic ink will clogg the filter. Use only dye-ink for all brother printers!!

Best resolutions will be achieved with original ink wich cleans the ph, too!

Nov 29, 2007 | Brother MFC 420CN All-In-One InkJet...

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