If your brother printer won't print black, perform the steps below in the sequence listed.
1. Is the top of the cartridge's breather tape completely removed?
2. Has the printer detected the new cartridge correctly?
3. From the LCD menu on the printer itself, run a maximum of two nozzle cleans on the black print nozzle.
4. Print a couple of solid black pictures using the highest quality photo setting on your printer. This ensures that all of the nozzles are printing, and it may also assist in pushing the ink out of the nozzle