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

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Printer will not print black.

My all in one will not print in black. also saus that I am low on Magenta. I replace an almost full black cartrige(expensive)...still didn't work. Replace the magenta (which was not empty. Printer is still telling me that it is near empty magenta. I cleaned the printer..still empty magenta...turned off printer. still empty magenta....Help!

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  • Anonymous Mar 14, 2014

    I replaced the magenta and cyan colors in the printer but there is an error and it is telling me to replace it again. what do it do? on the printer it says the colors is full.



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Try removing the magenta completely and shut the lid then open again then insert the new magenta and see if the ink device level on the PC shows full. Sounds like the system needs resetting. Alternatively change the magenta and power on and off the printer and see if this resets it.

Posted on Sep 03, 2007


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Posted on Jan 02, 2017


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You can find the user's guide here which lists all the parts and supplies. Here's the cartridge information from the manual:
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PRINTER (not web camera!) HP Deskjet 712c Printer began printing mostly blackPrinter began printing mostly black & magenta so I replaced the color cartridge. Color did not improve and then black...

First run the CLEAN HEADS and see if that helps. If you don't use your printer at least once a week the Print Heads get dried out and will not allow the ink to pass through to the paper.
Go to control Panel and click on Printess. Then when the window comes up, CLICK on Properties TAB and then in the next window, CLICK on CLEANING.
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Won't print black because magenta color is empty

Refill or replace the empty cartridge.

When you ask to print "black", a small amount of magenta is mixed-in.
No magenta, no print.

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Can I print "Black only on the Epson BX 300 F ?

Since the printer insists on having all 4 cartridges (non-empty) fitted before it will print anything, the only recourse to fitting new cartridges is to fool the printer into thinking your empty magenta cartridge has ink in it. You can do this by using a cartridge resetting tool to reset the magenta cartridge chip so it reads "full". A resetter tool can be obtained from e-bay very cheaply (£4 or less). You will find sellers who ship worldwide on E-Bay UK.

Be aware though, that if you forget to select monochrome printing, the colour ink is also used in black printing - and printing with a "dry" cartridge can damage the print head. You can guard against this by filling your magenta cartridge with distilled water.

You will also find sellers of magenta cartridges (and the others of course) on E-Bay UK who ship worldwide.

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First, wouldn't print black, now won't print magenta- all new cartridges!

Unplug machinepowercord. Open printer and take all carts out. Plug in power. Machine demands carts. Put new one in: Replace with original ink carts!. When asked push 1 (yes New cart). If you have used thirdparty carts, there could be a prob due to construticon or ink quality. In case there is no bk after 3x cleaning cycles anymore, the head is clogged: This happens because the filter in front of the nozzels is clogged by pigmented ink. DO USE ONLY DYE INK for all types of brother inkjet machines!!!

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