I have this HP Deskjet 1510 printer and I can not get it to print automatically. Every time I try and get it to print the attention light flashes. I have tried the usual checking for paper jams, checked there is no blockage on the carriage and the ink is installed properly. As far as I can tell every thing is okay. But I still cannot print. Does anyone else have this problem, or any ideas what else I can try? Thanks.