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Table 3-3 Heartbeat LED, product operational (continued)
LED color Description
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 connectivity LED is off if the power cord is unplugged, 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.
Connectivity LED
The connectivity 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
component. Use the connectivity LED to troubleshoot formatter and control panel errors to avoid
unnecessarily replacing these components.
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 component or power problem).
●
Interface cabling between the formatter and control panel is damaged or disconnected.
TIP: If the connectivity 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.
The connectivity LED operates according to the product state. When the product is initializing, see
Connectivity LED, product initialization on page 250. When the product is in Ready mode, see
Connectivity LED, product operating on page 252.
Connectivity LED, product initialization
The following table describes the connectivity operation while the product is executing the firmware
boot process.
250 Chapter 3 Solve problems ENWW