HP Photosmart C7280 All In One Printer, Fax, Copier, Scanner X3 (faulty) !

HP Photosmart C7280 All In One Printer, Fax, Copier, Scanner X3 (faulty) All 3 power up OK but: one keeps saying paper jam one prints ok in black & white but colour is off (blocked printhead?) one has issue with LCD screen No ink or power leads supplied. 50 for the lot.