HOW DO I FIX THE INK SYSTEM FAILURE FOR MY 6280 ALL IN ONE PRINTER OXC18AO501.

I HAVE TRIED SHUTTING OFF 6280 PRINTER UNPLUGGING ETC. CLEANING AND REPLACING INK CARTRIDGE.

DO I HAVE TO NOW BUY A NEW HP PRINTER.  THIS PRINTER IS LESS THAN TWO YEARS OLD.HHHHEEELLLLPPP!!!!!!!!