Model MFC-9970CDW. Why does it display 'print unable 40' or 'error'?

SOURCE: Brother Mfc 420cn says machine error AF

Open the small cover that hides the scanner flat cable. It has to be reconnected to the main pcb.

SOURCE: Error message ''Unable to Print 4F''

How to repair error "print unable 4F" in the Brother dcp-135c .
thank alot.

SOURCE: Brother MFC-9440CN error 5A print unable

Error 5A unable to print is a problem with the high voltage power supply PCB, or with the engine PCB. A shop could tell you which one after some testing. Expensive repairs...

SOURCE: brother MFC-465CN printer Error code 51 unable to print

Usually this is caused by a foreign object or debris under the printhead path, or under where the printhead "parks."

Unplug the machine. Open the cover. Check the printhead path for little bits of paper, push pins, paperclips, staples etc. Note the location of the printhead.

If the printhead is at the far left, gently slide it towards the center (do not force it). Look carefully under where the printhead was stopped for debris. Use a flashlight if necessary.

Close the cover. Plug in the unit. Try again.

Clive

• 4362 Answers
• Posted on Mar 02, 2010

SOURCE: brother mfc 240c error says print unable 51

Hi Ok try this it may work.
Hapens a lot
1.Go Menu
Type in *2864
Type in 10
Code WSW00 shows
Type in 51
Code WSW51 0000001 will show
Try different values, eg change to 000000 or 0000010
BUT remember original code to get back to
To exit type 99
Also can try.
Solution:
· Machine off
· Switch on the machine while holding down the “menu”button until all the leds are flashing on/off. Now you are in “maintenance” mode.
· Press 80
· Press the “mono start” button several times until you see “purge: xxxx”
· Press “2783” in order to reset the purge counter. You will see: “purge:0000”
· Press the "stop" button.
· Press “99” to exit the maintenance mode.
Please come back and just gave a vote, it will gave me some satisfaction to know am helping some one
All The Best: Pineworks
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