⚠
warning HP
Error Code Three quick amber flashes in the center of the light bar
Currently disabled button is pressed.
? What Causes This
An attempt to use a feature or button that has been disabled on the printer control panel
✓ How to Fix It
Identify and re-enable the feature if necessary in 'Printer Settings' or through the HP Smart app interface. If feature remains disabled consult service manual for further instructions.
Source: page 14 of the official manual
From the manual
This error code appears in:
HP Envy 6400E All-in-One Series Printer