My Epson Stylus 740 printer was working fine until today, when I started to print an email I had received. The printer box came up and it showed that it was printing, with the little blue line going across the box, except that it was not printing. Then it printed out a bunch of gobbledygook that looks like Greek. It just kept running paper thru and printing a line or two if that stuff on each page. I finally took the paper out so it would stop.What is wrong and how do I fix it?