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error HP
Error Code Protected cartridge
Protected toner cartridge detected — cartridge is write-protected.
? What Causes This
Cartridge is protected by security measures.
✓ How to Fix It
- Remove the cartridge.
- Reinsert it.
- If error persists, 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