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.
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.
The heartbeat LED operates according to the product state. When the product is initializing, see
Heartbeat LED, product initialization on page 138. When the product is in Ready mode, see
Heartbeat LED, product operational on page 140.
Heartbeat LED, product initialization
The following table describes the heartbeat LED operation while the product 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, see
Heartbeat LED, product operational
on page 140.
Table 2-9 Heartbeat LED, product initialization
Product initializing
state
Heartbeat LED, normal state Heartbeat LED, error state
No power (power cable
disconnected or power
switch off)
Off Not applicable
Power on (immediately
after the power switch
pressed)
Red, solid
●
Duration should be 1 second or less
Red, solid
●
Firmware error; problem finding hardware
and booting the serial peripheral interface
flash memory
◦
Boot process halted
Replace the formatter.
Serial peripheral
interface (SPI) flash
memory boot
Green, solid Red, solid
●
Firmware error; problem corrupt or missing
SPI flash memory
◦
Boot process halted
Replace the formatter.
138 Chapter 2 Solve problems ENWW
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