My Lexmark x4550 all-in-one printer

Question

My Lexmark x4550 all-in-one printer wont print anymore.It worked for a short time but now it doesnt print.I keep getting the error message communication problem,the printer cannot communicate with the printer.I have only had it for 3 weeks so i am thinking of returning it for a replacement.I have tried a few things that i have read on the net but nothing seems to work it out.Help someone please!