⚠
warning HP
Error Code LED blinks when toner cartridge is invalid or low on ink
Indicates either the toner cartridge is invalid or nearly empty.
? What Causes This
Invalid or depleted toner cartridge inserted.
✓ How to Fix It
Check display message and replace toner cartridge if needed.
Source: page 15 of the official manual
From the manual
This error code appears in:
HP Samsung Xpress SL M2071 Laser Multifunction Printer Series