!
error HP
Error Code LED blinks (printhead issue)
Printhead is malfunctioning or needs cleaning/replacement.
? What Causes This
Buildup in the printhead, faulty wiring, improper setup during installation.
✓ How to Fix It
- Follow reset steps to clear software locks.
- Manually clean the printhead if possible.
- Contact HP support for a replacement printhead.
Source: page 9 of the official manual
From the manual
This error code appears in:
HP Deskjet GT 5810 All-in-One Printer