⚠
warning HP
Error Code OPEN
Machine cover not completely closed — covers need to be aligned and secured properly.
? What Causes This
Lid or cover left open during operation.
✓ How to Fix It
Press the covers until they click to close them securely. Ensure all components are correctly repositioned before use.
Source: page 7 of the official manual
From the manual
This error code appears in:
HP Samsung Proxpress SL M4070 Laser Multifunction Printer Series