I have a Bravo SE printer at work, but when ever I print black it comes out a red/maroon colour. I've tried cleaning and religning, Ive taken the cartridge out and it looks fine. All of the other colours are printing fine. It's not that old and it says there is still 73% ink left. Please Help!!

on a colour printer, black is mixed with the other colours. Try printing a black and withe photo and you always get a colour cast. If your black cartridge is empty or the nozzles are blocked, you get bad colour and fussy prints.
test all nozzles, like is explained in the manual.
Check, if you know how to do, if nothing fell in the printer, that is now on the print head. Sometimes just dust or paper scraps are picked up by the printhead, making it difficult for the printer to print a normal page.

You could try to remove and reinstall your color cartridge again.Do a Clean Cartridges cycle.Then do an Align Cartridges cycle.

Does the printer head have a cleaning feature in the software? If it does I would try that to see if it improves your printing.

try clean heads, if more than one week without printing the heads ink dry.

NOTE:some internet sites, dont allow printing, so you can get the same results.

Did you clean the printer heads manually with alcohol and a Qtip?

Also pop out the red cartridge, cover the hole and give it a good shake, then try again.

Chances are the red ink simply wasn't as "fresh" as the others.

You probably need a new purge assembly, it draws some ink to both clean and prime the printhead. When it stops working you won't get any ink to the paper.

I would try cleaning off the nozles on your print cartridges. If that doesn't help, replace them altogether.

Hello! I need help!
My Brother printer - DCP-135C
I've changed all inks include the colours.
I able to print the Red, blue and yellow. But I can't print the Black.
I've tried pressed the cleaning option for many times.. Please advise some help.

Rgds, V

The printhead is clogged.

See the following guide:

Canon iP3000/4000/5000 Printhead Cleaning Guide

If it does not work, replace the printhead: Genuine Canon Print Heads

Rhis seems to be a printer Firmware problem, Nothing for it but to bin the printer and start again.