HP LaserJet Enterprise 600 Service Manual - Page 225
Connectivity LED, product initialization, green-the LED is off if the product is
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The connectivity LED operates according to the product state. When the product is initializing, see Connectivity LED, product initialization on page 201. When the product is in Ready mode, see Connectivity LED, product operating on page 203. Connectivity LED, product initialization The following table describes the connectivity operation while the product is executing the firmware boot process. NOTE: When the initialization process completes the connectivity LED should be illuminated solid green-the LED is off if the product is in Sleep Mode If after initialization the connectivity LED is not solid green, see Connectivity LED, product operating on page 203. Table 3-9 Connectivity LED, product initialization Product initializing state Connectivity LED, normal state Connectivity LED, error state No power (power cord Off unplugged or power button off) Power on (immediately after the power button pressed) Red, solid ● Duration should be 1 second or less Not applicable Red, solid ● Firmware error; problem finding hardware and booting the serial peripheral interface flash memory ◦ Boot process halted Serial peripheral interface (SPI) flash memory boot HW checks on board DRAM Control panel connection initializes Replace the formatter. Green, solid Red, solid ● Firmware error; problem corrupt or missing SPI flash memory ◦ Boot process halted Replace the formatter. Green, solid Red, solid ● Power on self check failure ◦ Boot process halted Replace the formatter. Green, solid NOTE: Control panel communication successful. If an error occurs, a message should appear on the control-panel display. Yellow, fast flash ● Formatter to control panel connection failed ◦ Boot process continues Check the cables between the formatter and control panel for damage. Make sure that the cables are fully seated. ENWW Tools for troubleshooting 201
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