⚠
warning HP
Error Code Attention LED blinks
Indicates that user intervention is needed or there's an issue requiring attention.
? What Causes This
Unspecified; varies from a job needing attention to a setup issue or problem condition.
✓ How to Fix It
Refer to on-screen messages and manuals for specific actions.
Source: page 4 of the official manual
From the manual
This error code appears in:
HP Laserjet Pro M203 Printer