I have an HP all-in-one 2175 series. I had it for a couple of years now. out of the box, it printed fast. now, it prints extremely slow even on fast mode. occasionally the printer starts working properly and prints one page quickly, but then starts printing slow again. i recently formatted my computer and the same thing happens. i updated the firmware off the hp site which is supposed to fix the slow printing but it did not. Any suggestions?