Double-check that your model is fully compatible with V3400. You may need to upgrade to a newer version, such as Service Tool V4900 or V5103. Software Freezes or "Not Responding"

Executes deep nozzle checks and alignment patterns directly from the software.

: The tool only functions when the printer is manually placed into "Service Mode" through a specific sequence of button presses (usually involving the Resume and Power buttons).

Not immediately, but if you ignore actual pad saturation, ink may eventually leak inside the printer — damaging electronics or staining surfaces.