Brother MFC255cw black ink not working

could it be problem with the printer head?? or there is something else??

I'd need to ask if the old cartridge worked until the ink was gone. If it did and the new cartridge isn't working, my obvious first thought is to look there. We make sure any and all contacts are clean and the cartridge is properly installed. If no go, we try another cartridge but we use one that's from the manufacturer's source. Again, you said it was a generic so these are either store brands or refills. They vary in quality and the number of dissatisfied persons with such is well documented. I don't know how that particular printer deposits ink but if the print head is separate from the cartridge, it surely could be bad or just clogged. But I'd definitely consider what the condition of the old cartridge was when it was replaced. If it worked until empty, the new cartridge is the obvious suspect.

Generic ink does tend to cause a big problems. Most of the time, those things are shipped from overseas on large boats. Large hot boats, for long periods of time. The extreme heat causes the nickel plating inside to separate, and clogs up the ink nozzles once you start printing. Its not something that will usually happen immediately, in most cases it may take 2-3 cartridges before you notice a problem. I'd recommend calling Brother, let them do their thing, and take whatever warranty options you can get.

I have the same issue with my printer but I'm using refillable cartridges, not a expert or tech on any kind of printer but I mess around with all electronics so I decided to take the printer a part to see what the issue was and when I took it a part it looks like the hose that connects the black ink to the printing line was missing. This to my knowledge was the first time this printer had ever been taken a part so how could the hose come lose and I looked around for it inside the printer and couldn't find it. Since more people have been reporting black ink issues it leads me to believe that it could be a defect if the hose has come detached from other printer as well, but I will be getting mine fixed because it is a great all around printer, scanner, copy, and fax.

GOD First

What I find interesting is that today I'm encountering folk that think these things are immune to age or when it fails after a few years that it's a design flaw!
Bob

My problem occured 6 months after buying it, I used the Brother ink recommended, and the printer won't work cause it thinks there is no black ink. I'd say I got a lemon.

Things do not last years. And if they fail (and they do!) in warranty that is why they give the warranty.

Because things can fail!
Bob

It helps them get it out and move to the next step.

It's only 6 months old so well inside the warranty. Once in awhile you encounter folk that think this should not happen. I'm ready to dash that notion when you are.
Bob