Printer don?t print - HP DeskJet 845c Printer

Hi, the problem can be related to any of a number of things. First of all make sure that there isn?t any extraordinary LED blinking. Every LED has a troubleshoot in the manual(which you can download here on Fixya). If there?s no blinking going on check for the following: The power supply to the printer, along with the line(cable and socket). That the ink cartridges fit well. You have paper in the tray, and there?s none stuck inside. The printer cover is well shut. All parts are well connected(such as the paper tray) If everything seems to be in order try connecting it to another computer? maybe the USB connection isn?t a 100 percent, and the communication between computer and printer is at fault, or there?s some software problems, or anything that?s computer related. Could also be router or print server problems if you are using either one. Check out the troubleshoot pages for your router here in Fixya, they contain reference to that on some routers.