4PK LKB 940XL Ink Cartridges compatible for HP940 Printhead C4900A C4901A with Officejet Pro 8000 8500 8500A 8500A Plus Printers (940XL Cartridge)-UK

Package Included: 1xBlack, 1xCyan, 1xMagenta, 1xYellow , 1 set of 940XL Ink Cartridges， 4 Pcs. 100% compatible with the following printers: . HP Officejet Pro: 8000 – A809a , 8000 Enterprise – A811a , 8000 Wireless – A809n . HP Officejet Pro: 8500A – A910a , 8500A Plus – A910g , 8500A Premium – A910n Normal Printing Problem Solution: . The ink cartridge can’t be recognized by the printer: 1. Confirm the ink cartridge color, and check whether the ink cartridge for all colors put the correct position and direction or not; 2. Take out the ink cartridge for all colors, and then turn off the printer. 3. Turn on the printer 4. Install one color (for example: BK color) and check the printer what will say on the screen. If say “Missing other colors”, it means this BK color is OK. 5. Take out BK color, and install another color (only one color each time for testing), if the printer show as same as Step ④, it means this color is OK too. 6. You will get the answer via Step ④ and ⑤ that which ink cartridge color is not recognized by printer 7. Cleaning the chip and probe on the print head, install all cartridges for all colors. If still some ink cartridge can’t be recognized, we will replace it to you ASAP. Note: 1. Our Ink Cartridges are compatible, not original one, Non OEM value-save more for you; 2. If the print head is clogged, Please Cleaning the print head. 3. When you replace the print head, please do Printer Head Cleaning 2~3 times every time. After-sales Service / How to contact us( 2 years Money Back Warranty): Product listing > Click Sold by Lucky Bridge> Choose the option Ask a question Log into Your Account > Click Your Account > Your Order > Find your order and click Contact Seller