Im not super tach savvy so need help - please guy. Upstairs laptop cvan detect and print to my WF2750 printer. Desktop PC which is literally next to the printer cannot detect it. Epson online help after one hour said it must be my ISP and so was not their problem. Ping test from PC to router and PC to printer shows a general failure. PC has fibre connection. PC and printer are connected to same router. I have tried both usb and wifi connection from Printer>PC and still the PC cannot find the printer. Any ideas ?