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Re: when running a test print on my mfc 420cn it will not...
Driver could be corrupt. Disconnect the printer or at least be sure it is turned off.
I'd do both and reinstall the CD software program that came with
the printer. When the software program asks you to connect the
printer to the USB port, do so and it should again work properly.
Hope this helps. Bud
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Hi .. i have a similar problem ... i juste replaced the Black cartridge ... and when i run a "test print" or an 'alignment print" ... the whole black ink block doesn't appear at all .. only the Magenta, CYan & Yellow are ok. HELP ! ;)
Sounds like most of the color lines (the "cables" between print head and cartridges) either have clogged ink in them, or air bubbles. Try the cleaning process found by pressing Ink Management and then Menu/Set twice. After the test print sheet is printed, answer the question(s) in the display and print up to five test prints by answering the questions. It should solve the problem, but if it doesn't, you should perform a heavier duty purge found in the service mode.
Brother Error Codes
RAM clear (most models) Quickly press function * 2 8 6 4 Display should read maintenance Press 0 1 for a full ram clear, or 9 1 to retain user data Display should read reinit for a few moments then redisplay maintenance Press 9 9 to exit the maintenance mode
Other maintenance mode switches: 01 ram clear (see 91 below) 02 scanner initialize (feed a white sheet, then a black sheet) 05 white level 09 print test 10 modify soft switches 11 print configuration list 16 panel test 19 CML test 20 signal test 21 tonal test 23 filter RX 54 scan edge 55 scanner area 66 test print memo 75 display drum life (if enabled on laser models) 76 reset drum life counter (laser models) 91 parameter initialize (user programming remains intact) 95 protection Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one so I will keep on helping.
All The Best: Pineworks
Driver could be corrupt. Disconnect the printer or at least be sure it is turned off. I'd do both and reinstall the CD software program that came withthe printer. When the software program asks you to connect theprinter to the USB port, do so and it should again work properly. Hope this helps. Bud
My yellow cartridge was doing the same thing as your black. So I took the cartridge out, and took a flashlight to see how it works. There is like a little straw on the right hand side which goes up into the printer cartridge, this I assume is to measure the ink. I took a needle and cleaned that 'straw' thoroughly. Reseated the ink, ran cleaning and test print, and then the printer found the yellow ink! You could give that a try. It might work for you too. (I have never used any ink but Brother ink in the printer, btw.)