.Hello my name is***** look forward to assisting and am very sorry to hear that you are having this problem.I want to warn you that it is possible you will need to replace a part in order to fix this.There are a few different things that can cause this and a couple different parts so we would need to troubleshoot to find out for sure.Are you using genuine Canon ink? Does it ever flash green?.
No, I use compatible cartridges and have always done so without any trouble as they are so much cheaper. I have never seen a green flash
OK I will buy some and do as you say but will they work if the print head is damaged?