.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. It should flash in a pattern or a specific number of times, what pattern/number of times is it flashing? What model canon pro is it?.