Individual component diagnostics
Tools for troubleshooting: LED diagnostics
LED, engine, and individual diagnostics can identify and troubleshoot printer problems.
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 o. When the printer has nished the initialization
sequence, the heartbeat LED pulses on and o.
The following list describes the heartbeat LED operation while the printer is executing the rmware boot
process.
If after initialization, the heartbeat LED is not solid green, see Table 2-9 Heartbeat LED, printer operational
on page 142.
●
Green
◦
Blinking: The printer is correctly functioning.
◦
Solid: The FW has not yet booted.
●
Amber
ENWW Tools for troubleshooting 141
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