⚠
warning HP
Error Code LED blinking with one Ink Alert light blinking (after new install)
The newly installed ink cartridge might be counterfeit.
? What Causes This
Newly-installed incompatible or previously used ink cartridge.
✓ How to Fix It
Replace the ink cartridges if they are newly installed; follow screen instructions and continue printing until replacement needed.
Source: page 6 of the official manual
From the manual
This error code appears in:
HP Deskjet Ink Advantage 2135 All IN One Printer