info HP

Status Ready light on - no job processing

States that the printer is ready but there's a lack of jobs being sent.

? What Causes This

Typical when no documents are set for printing or system issues prevent initiation of print jobs.

What This Means

Ensure that you're running print jobs with an active document and troubleshoot network or software conflicts affecting job submission.

Source: page 61 of the official manual

From the manual

Manual page 61 — HP error Ready light on - no job processing

This error code appears in:

HP Laserjet 1015 Printer