I have a Brother printer model number DCP-J315W and I have ALWAYS printed in BLACK and white but lately the print is in blue even though I have selected black.It has been like this for a few weeks ago.Have just checked the ink level and the yellow, blue. and magenta are almost ful but the black is over half empty.Can someone explain whythis happens. Ihave just tried the following
Press Menu.


Press the up or down arrow key to choose Ink or Ink Management. Press OK.


Press the up or down arrow key to choose Test Print. Press OK.


Press the up or down arrow key to choose Print Quality. Press OK.


Press Color(Colour) Start. The machine will print the Print Quality Check Sheet.

And what I got was a page showing two blue segments one magenta and half of the yellow segment but no black

I also clicked on Menu then ink management then test Print then print quality same resultHave you cleaned the print heads? It may take up to 5 cleanings to CLEAR a clogged print head ACCORDING to user manual.Replace the black cartridge after doing the above...it may look 1/2 full but likely dried out...Sorry for messing you around as I feel a right idiot have just found out what the problem is I have two blue cartridges instead of a blue and black.I must admit I have never thought about that.Not sure how that happened.Thereis still a problem with the yellow which is almost full but on the test page there are only three lines despite during several clean up's.I thought I had better let you know and feel a right dickhead.Thaank's for all the repliesGlad you dot it sorted...Hi

To fix the yellow you will need to replace the print head. Which COSTS as much as the printer. So now might be an opportunity to look at what you are printing. If you don't need colour then perhaps a Black and white laser printer, this would be cheaper to run and maintain. Ihave just bought a set of cartridges and removed the blue cartridge which was in the slot where the black one should have been and then fitted the black cartridge but when I did a test page There were still two blue prints so not sure what tio next.