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

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Changed all 3 colors and black---Red not printing

When printing, no red is coming out. Prints brown??? Help

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  • bobiv Mar 17, 2008

    Thank you Guru,

    It worked, all clean and all 4 clear on test print.

  • la_jolla_ace Apr 11, 2008

    same problem except mine is barely printing magenta. On the test print only four tiny red dots appear. I installed new print cartridges but that did little more than shrink my wallet. I tried the suggested solution (menu, start bk - copy, up, up, up, up, 7,6,4 start bk, 7,6,3, start bk, 9, 9, test print) and still 4 red dots. I chose no, yes, no for quality ok, black ok, and color ok respectively and chose yes for start cleaning. after cleaning I printed another test page same thing, except the dots are getting darker as I clean.So i went back in to maint. mode and tried 7,6,2 and then 7,6,5 (I don't know what they do i'm just that kind of guy) after they completed I 9,9'd out and tried to print another test page. still 4 dots, still getting darker, so I chose no, yes, no, yes for quality, black, color, clean - respectively. After cleaning I tried printed another test page but got a paper feed error so I inserted a piece of paper in the tray and pressed start again. The test page printed and low & behold 4 red dots. I went back into maint. mode and tried 7,6,1 (again not knowing what these codes mean just being that kind of guy )and pressed bk start when it said "something_p all" (forgetting what something was) after another cleaning cycle i tried 7,6,0 and it went into some crazy clean cycle that was non stop until i got machine error 8A, so I 9,9'd out of that and went back into maint mode and tried 7,6,7 - the message said c-p-cart all and sounded like it was doing something so I waited and waited and waitd a long time - and when it was done and again said MAINTENANCE I tried 7,6,6, (realizing i skipped it earlier. 7,6,6 gave me a message of eINIT_P ALL. Determined to go through all the 76's I tried 7,6,8 and 7,6,9 which read DRYPRF_P ALL and INK_NUKI ALL respectively. After I completed all the 76's I was feeling quite pleased with myself so I went ahead and tried 7,6,0 again because I liked the way it sounds and because I wanted to see If I would get another error 8A message. I did so I 99'd out and tried printing another test page. THIS TIME I GOT 6 RED DOTS!! so again I chose no, yes, no for quality ok, black ok, and color ok respectively and chose yes for start cleaning. after cleaning I printed another test page ...6 dots. I'm not sure if I going to move up to the 77's or down to the 75's but if you have any suggestions I would appreciate them.



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Print is brown: mingles yellow with bk and cyan and red.

Did you use generic ink? You have to use a set of original brother ink carts: dinsert the original carts. press menu then start b/w copy then fourtimes arrow-up. when machine is in maintenance mode press 7 then 6 then 4 then start b/w copy. machine will initiate the carts and do some power cleaning. whnen finished press 7 then 6 then 3 then start b/w copy. machine does a power purge. leave maintenance by pressing 9 then 9. Do run a test print. If you cant see any mag. do the power purge two days later. If your not lucky then (you cant see ANY mag squares on test print) the head is defective and needs replacemnt.

Posted on Mar 16, 2008


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