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critical HP
Error Code HP ePrint light blinks continuously
The HP ePrint feature is on, but the printer is not connected to the Web Services server.
? What Causes This
Printer configuration or web services connectivity issues.
✓ How to Fix It
Press HP ePrint button and Information button together to get a diagnostic page. Follow instructions from the diagnostic page for troubleshooting.
Source: page 45 of the official manual
From the manual
This error code appears in:
HP Ink Tank Wireless 416