Printhead Affected date range (YYYYMMDD format)
- HP 11 Cyan, Magenta, Yellow (C4811A, C4812A, C4813A)
- March 2020 and later (marked 20200301 and later in YYYYMMDD format)
- HP 11 Black (C4810A)
- )April 2020 and later (marked 20200401 and later in YYYYMMDD format)
The Warranty Ends date is printed on the printhead packaging and on the printhead itself in the locations shown in the picture.
If you have an affected printhead, follow these steps:
- On a Windows XP, 7, 8, or 10 PC with a USB connection to the printer, download a zip file with your firmware.
- Open the zip file and run the HP DesignJet 500/800 Firmware Upgrade Tool A.05.01.
- Wait for the upgrade to complete, and then turn the printer off, and then back on.
- If the steps above do not help, contact HP Support for a replacement. Contact HP directly, rather than returning to the retailer.