Question about Brother MFC-9420CN All-In-One Laser Printer

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Brother MF 9420CN is asking for troubleshooting and routine maintenance 'unable to print'

Brother MF 9420CN is asking for troubleshooting and routine maintenance 'unable 2 print', What do I do? Reset maybe? How would I reset the printer?

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  • Craig Nel
    Craig Nel Jan 22, 2008

    do u guys know where the battery is for the printer? I think the printer logs 'millage' and sends errors according to that. I've found some to be false.

  • Craig Nel
    Craig Nel Feb 04, 2008

    Ok maintenance on the printer is actually simple, seeming that I now asked brother to collect the 34 mfc 9420's and 8 mfc 8440's I figured out that u press menu then mono start then the up arrow 4 times, (the maintenance screen will appear, press 77 print a page from the pc and then press 99. The unable to print error will go away. Also thanks to this website I was tought how to clear that opc belt error. 1 and 7 at the same time, 1 for reset...

  • Anonymous Feb 10, 2008

    "unable to print" still appearing after following the steps describe above when I press "77" it will try to print page and the error reappear

  • TomZ Feb 23, 2008

    I see Unable to Print' problem also. Where is the Mono start button?

  • Treshon Feb 24, 2008

    i keep getting an arror message sayin No opc belt but the belt is very new what do i do to stop this message

  • Anonymous Mar 09, 2008

    unable to print..what is the solution

  • Anonymous Mar 09, 2008

    page prints with a wide smudge down the middle

  • moussa saadou Apr 23, 2008

    It was after a routine maintenance that my MFC-9420CN start

  • Oto Alan May 12, 2008

    I was printing on the MFC 9240CN and got a message "no OPC belt". I took the belt unit out and put it bcak in and printed 10 more copies. Then "unable to print" message so I followed the manual and switched the printer off, waited switched it on and printed another 10 copies. THen got "no OPC belt" error again. I removed the OPC unit wound it on a little and put it back to print another copy. I am not sure if I've fixed the problem though.

    Alan

  • Anonymous May 17, 2008

    Have the same message but the steps dont seem to fix it. Rang Brother and they will get back to me next week. This is a fax needed 24/7 so 2-3 days for a response sucks! Going to buy a new fax from a reputable company with a 24 hour support service.

  • Anonymous May 23, 2008

    I have a Brother MFC-8440 and the maintenance fault # 7 came up. I just fixed the problem pressing the menu and select buttons at the same time then turn on the printer main switch. After this the fault completely clear and is working fine since. Does any body know if that was a proper way to fix this problem?

  • Anonymous May 25, 2008

    pleess mfc 9420cn machine error 21 and factory reset ?

  • lakota8 Jul 24, 2008

    I have the same problem (unable to print,troubleshoting etc...) and I made all steps you adviced(menu,mono start,arrow 4 times,77,99...)and sth happened: three buttons(fax scan ,copy are lighting)and it doesn't work at all,what to do???

  • computer_tea Dec 03, 2008

    I had a paper jam in the fuser and got this error. Unable to print etc. Cleared out paper jam, cleaned all parts and still get the error. What buttons am I supposed to press to clear it so I can print again?

  • tim5484 Jan 13, 2009

    After start up, my Brother MFC 9420CN screen reads "unable to print".

  • Anonymous Mar 31, 2014

    unable to print troubleshooting maintenance chapter in user's guide in brother 9420cn printer

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5 Answers

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Via the control panel (This is a Factory Reset)

  1. Make sure the machine is not operating, then disconnect all the cables from the machine (except power cable).
  2. Press the Menu or Menu/Set key on the control panel.
  3. Press up or down navigation key to select LAN and press Set or Menu/Set.
  4. Press up or down navigation key to select Factory Reset and press Set or Menu/Set.
  5. Press 1 to select "Reset".
  6. Press 1 to select "Yes".
  7. The machine will re-start, re-connect cables once this is complete.

Posted on Jan 27, 2009

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My MFC-9420cn is demonstrating the same problem. At first I thought it was because the "parts life" indicated that "PF Kit" life was down to zero.
The Users guide did not help at all. After considerable on line research I found that the PF Kit is only on machines with the second paper tray -- so my machine did not have a PF KIt. I went to the trouble of obtaining firmware update "version j" and installing it It did convince the machine that there was NO PF KIT, but did not solve the problem. Next, I replaced the OPC belt I was using with one that I bought recently which makes streaks. I had spent over $300 in response to the message which said "Replace OPC Belt cartridge but the new one started making streaks after about 300 pages, so I put the original back in - [it made white marks on a color picture -- but I can live with it ]. When I put the defective [but low page count] unit back in, the message seemed to have stopped. So I have 4 choices: 1) use old cartridge - run a few pages, get message, turn off for several hours, start again; 2) run with newer OPC BELT, get horrible streaky pages and faxes I can't read; 3) Spend another $300 and hope I get a good OPC BELT. 4) try to figure out how to defeat the page count feature on the original OPC BELT cartridge. I cannot find any phone number or email link to complain. I feel that this machine is a joke on the public. SHAME ON BROTHERS. I HAVE BEEN MPCed.

Posted on Feb 02, 2008

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Brother mfc 9420cn machine error 21 ? thankyou

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Brother mfc9420cn factory reset

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Brother 9420cn machine error 21?

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