I had error on hp Dj T120 ,not recognize black cartridge.I solved problem with hard reset on ploter settings service menu.After 3 days and good works ,printer has new error 26:10 (ink system)I seen too much ink on the contact on the print head between 8 spring on the PCB board print head .I clean it but tomorrow again I see ink between contact for recognize cartridge.I will try soldering, shortest contacts and insulation contact but ink leak behind print head?I find broken black adapter above print head and short soldering contacts are good.
