HP LaserJet Enterprise MFP M528f

Understand lights on the formatter

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

1 Heartbeat LED
2 HP Jetdirect LEDs

Heartbeat LED

The heartbeat LED indicates that the formatter is functioning correctly. While the printer is initializing after it is turned on, the LED blinks rapidly, and then turns off. When the printer has finished the initialization sequence, the heartbeat LED pulses on and off. The following list describes the heartbeat LED operation while the printer is executing the firmware boot process.

NOTE:
When the initialization process completes, the heartbeat LED should be illuminated solid green.

If after initialization, the heartbeat LED is not solid green

• Green
  – Blinking: The printer is correctly functioning.
  – Solid: The FW has not yet booted.
• Amber
  – Blinking: The control panel is not detected.
  – Solid: The FFC between the formatter and DC controller is not connected or is damaged.
• Red
  – Solid: Valid SPI code; there is a problem releasing ASIC and running the BIOS
  Solid: BIOS initiates PROSAC to change the LED from red to green.
  Solid: PROSAC is not running (No ROM or SPI code).
  – Blinking: Valid SPI code not found.
• Off: No 5V or 3.3V PROSAC power.

The following table describes the heartbeat LED operation when the printer completes the firmware boot process and is in the Ready state.

LED color	Description
Green	Normal operation – Formatter is operating normally – Firmware is operating normally – Control panel is connected
Yellow	Formatter cannot connect to the control panel – Check control panel connections – Verify control panel functionality
Red	Formatter error or failure – Serial peripheral interface (SPI) flash memory boot error – Power on self-test (formatter) failed – Diagnostic (formatter) failed
Off	TIP:The heartbeat LED is off if the power cable is disconnected, the printer power switch is in the offoff position, or the printer is in Sleep Mode. Firmware or system freeze – Check control panel for an error message – Control panel failure NOTE:This condition is not usually caused by a formatter failure. Turn the power off, and then on again. If the error persists, perform a firmware upgrade.

HP Jetdirect LEDs

The embedded HP Jetdirect print server has two LEDs. The yellow LED indicates network activity, and the green LED indicates the link status. A blinking yellow LED indicates network traffic. traffic. If the green LED is off, a link has failed. For link failures, check all the network cable connections. In addition, try to manually configure configure the link settings on the embedded print server by using the printer control-panel menus.

1. From the Home screen on the printer control panel, scroll to and touch the Administration button (FutureSmart 3), or scroll to and touch the Settings button (FutureSmart 4).
2. Open the following menus:
   • Network Settings (FutureSmart 3) or Networking (FutureSmart 4).
   •Embedded Jetdirect Menu
   •Link Speed
3. Select the appropriate link speed, and then touch the OK button.