!
error HP
Error Code Unauthorized cartridge
Unauthorized toner cartridge detected — cartridge is not an authorized HP cartridge.
? What Causes This
Non-genuine or refurbished cartridge installed.
✓ How to Fix It
- Remove the cartridge.
- Reinsert it.
- If error persists, replace with an authorized HP cartridge and visit www.hp.com/support/ljM255.
Source: page 8 of the official manual
From the manual
This error code appears in:
HP Color Laserjet Pro M255 M256 Printer