Table 2-8 Heartbeat Led, Product Initialization - HP LaserJet Enterprise 700 M712 series Handbuch Zur Fehlerbehebung

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 connectivity LED is illuminated, 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
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
—the LED is off if the product is in Sleep Mode.
Table 2-8
Product initializing
state
No power (power cable
disconnected or power
switch off)
Power on (immediately
after the power switch
pressed)
Serial peripheral
interface (SPI) flash
memory boot
HW checks on board
DRAM
102 Chapter 2 Solve problems
Heartbeat LED, product initialization
Heartbeat LED, normal state
Off
Red, solid
Duration should be 1 second or less
●
Green, solid
Green, solid
102.
Heartbeat LED, error state
Not applicable
Red, solid
Firmware error; problem finding hardware
●
and booting the serial peripheral interface
flash memory
◦
Replace the formatter.
Red, solid
Firmware error; problem corrupt or missing
●
SPI flash memory
◦
Replace the formatter.
Red, solid
Power on self check failure
●
◦
Replace the formatter.
Boot process halted
Boot process halted
Boot process halted
ENWW