Does anyone have any good tips on how to get my new(ish) Epson SX515W printer to print (bought it Feb)? I (foolishly??) replaced the cartridges with compatibles as everyone on here seems to think they're ok to use. Basically the magenta has not worked since and now the black won't come out either. Have gone through nozzle check followed by head cleaning now but am having no luck. Seems there is a blockage as the ink is certainly coming out of cartridge ok, but not sure how to unblock printer itself. Don't want to bugger up the printer. Any ideas? Would be eternally grateful.