ℹ
info HP
Status Status light pulsing green
Printer is updating firmware or currently busy processing a job.
? What Causes This
Normal operation during updates or job processing.
ⓘ What This Means
Wait for the update or job to complete. Do not turn off the printer.
Source: page 2 of the official manual
From the manual
This error code appears in:
HP Laserjet M207E M212E Printer