Magenta ink colour
I had the same problem. Try cleaning the print heads. They tend to clog. Remove the cartridges, then remove the print head. Tilted slightly, it comes out easily. Run very warm to hot water over the print heads until they all run clear. Use a turkey baster to apply strong pressure to each head until it runs clear. Blow off the excess water with mouth or blow dryer. Insert into the printer and proceed to print. If that doesn't solve it, you might have a bad cartridge, but there isn't much that can go wrong with the cartridge. I have an ip4200 and an MP830. They have the same print heads and same cartridges. I have cleaned each twice and they work like new.