HP LaserJet Enterprise Flow MFP M575

LED, engine, and individual diagnostics can identify and troubleshoot product problems.

Understand lights on the formatter

Three LEDs on the formatter indicate that the product is functioning correctly.

1 - Connectivity LED (smiley face)
2 - Heartbeat LED
3 - HP Jetdirect LEDs

Heartbeat LED

The heartbeat LED provides information about product operation. If a product error occurs, the formatter displays a message on the control-panel display. However, error situations can occur causing the formatter to control panel communication to be interrupted.

NOTE:
HP recommends fully troubleshooting the formatter and control panel before replacing either assembly. Use the heartbeat LED to troubleshoot formatter and control panel errors to avoid unnecessarily replacing these assemblies

Formatter to control panel communication interruptions

• The firmware does not fully initialize and configure the control panel interface.
• The control panel is not functioning (either a failed assembly or power problem).
• Interface cabling between the formatter and control panel is damaged or disconnected.