My brother 9700 all in one printer, appears to have stop communicating with my computer, it will fax, copy, scan, but it will not print anything directly from my computer, not even a test sheet. What ?????????

SOURCE: wont print anything

Move the ink cartridge carriage (the printhead) to the middle of the printer like you're going to change cartridges.  Take out all the ink cartridges.  There should be two black springs on either side of the printhead.  Remove these and the printhead should pop out.  Clean the nozzels (the little parts that squirt out ink) and reassemble.

If this doesn't work, then you'll have to replace the printhead.

SOURCE: brother mfc 8440 "printing" problems

Hi
I recently had this problem - tested fuser and all sensors.
The fix is to reset the memory.
To do this, enter the Maintenance mode. Menu, * 2864
(enter the number quickly)
then type 01 ( zero one ), this will reset all memory including the user settings.
Finally type 99 to exit Maintenance mode.
The printer will restart and the error will be gone. Test out with copy and printer reports
Hoping this fixes your problem
Regards
Lindsay

SOURCE: Brother mfc-9700 buttons quit working.

make sure you don't have a button stuck in the down position. it will lock up control panel. if all else fails, try unplugging for a couple of minutes.

hth,
razors

SOURCE: mfc-7420 Black Line horizontal across paper in 3 places

try moving the small blue slider on top of the drum cartridge side to side 10 times.

SOURCE: Brother DCP 330C 'unable to clean 46' printer will not print

responded to this on a error 46 post by joachim.

hth,
razors