Status A

Alignment required — printer needs printhead alignment for optimal print quality.

? What Causes This

Printer detects a need to optimize or re-orient the placement of printheads on internal mechanism after extended periods of inactivity, replacing printheads, or print quality degradation.

ⓘ What This Means

1. Complete the alignment process by printing an alignment page and placing it back onto scanner glass to scan for recalibration data.

Source: page 38 of the official manual

From the manual

This error code appears in:

HP Deskjet GT 5820 All-in-One Printer