Paddsun 5 Slot PhotoSmart Print Head for HP 564 CB326-30001 CN642A, Black For HP 564 OfficeJet B8500 printhead Refurbished Please confirm the fault part of your printer before you decide to replace a printhead. For example: *If you get Error 5100,you need to: a. Clear debris from carriage head to eliminate canon error 5100. b. Make sure you set the ink cartridges properly. c. Lubricate the purge cap. d. Clean the Timing film. It is not the fault of printhead.* If the printhead cant print colors.Please take out the printhead from your printer,and use a white tissues to touch the mouth of the printhead.If the color print on the tissues,it means not the fault of printhead,and you need to continue to troubleshoot. Please contact us, if you get error B200. Printhead for HP564XL HP 564 Ink Cartridges Refurbished Make sure you purchase the right model of printhead.