HP LaserJet Enterprise Flow MFP M575
Troubleshooting. LED diagnostics. 3 Heartbeat LED, product operating
The following table describes the connectivity operation when the product completes the firmware boot process and is in the Ready state.
TIP:
If the heartbeat LED is illuminated—by an error condition or normal operation—the formatter is fully seated and the power is on. The pins for the LED circuit in the formatter connector are recessed so that this LED will not illuminate unless the formatter is fully seated.
| 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 product power switch is in the off position, or the product is in Sleep Mode. Firmware or system freeze ◦ Check the 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. |