HP 771 Original Matte Black and Chromatic Red Printhead CE017A

[IMPORTANT]
771 is being phased out and will no longer be manufactured. 771B is the replacement of 771.
Latest version of printer firmware is required to use the 771B. If the problem persists, please contact HP directly to get the cartridge works.

 

For troubleshooting, please refer to
https://support.hp.com/au-en/document/c06596968