I have a Canon G6040 Ink Tank. It has been working perfectly well until a couple of days ago when the black,red and yellow stopped flowing. the tanks are all about 3/4 full. after doing the deep cleaning a couple of times, the blue stopped flowing and only the black and red were printing.; I have tried the Ink Flush for all and separately for colour but now only the black is printing. Please help as this is very frustrating. at random I am getting a 5200 error when doing the ink flush but it is not consistent
