Chosen Solution

My printer just stopped printing in black. It will print some sections, but not all. Very light with whole section lines missing in blocks. I have changed the ink cartridge twice now. First one that stopped was a refill. Second one was brand new ink cartridge from Staples. I have cleaned the heads, alignment, done printer tests, etc. Nothing works. Help!

Its mostly a clogged black nozzle. to check if its the nozzle do a nozzle check by going to Setup > Maintenance > Nozzle Check and if the black one is missing on partly missing do a head cleaning and try again.