ℹ
info HP
Status Power button light blinking
The printer is turning on or off, or processing a job.
? What Causes This
Normal operation during startup, shutdown, or active job processing.
ⓘ What This Means
To cancel the job, press the Cancel button.
Source: page 16 of the official manual
From the manual
This error code appears in:
HP Smart Tank 6000 Printer