HP LaserJet Enterprise 500 Service Manual - Page 284
Solve problems, Product initializing, state, Heartbeat LED, normal state, error state
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Table 3-2 Heartbeat LED, product initialization (continued) Product initializing state Heartbeat LED, normal state Heartbeat LED, error state HW checks on board DRAM Green, solid Red, solid ● Power on self check failure ◦ Boot process halted Replace the formatter. Control panel connection initializes 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. Preboot menu available (including diagnostics) Green, solid Red, solid ● Diagnostic failure ◦ Follow diagnostic instructions Turn the power off, and then on again to restart the initialization process. Accessing disk for firmware image Green, solid NOTE: If applicable, disk error messages appear on the control-panel display. Yellow, fast flash ● Control panel not connected Firmware boot Green, solid Yellow, fast flash NOTE: If applicable, error messages appear on the control-panel display. ● Control panel not connected Product operational Green, heartbeat blink Yellow, fast flash NOTE: If applicable, error messages appear on the control-panel display. ● Control panel not connected 49.XX.YY error or initialization freezes Not applicable LED off NOTE: An error message (for example, 49.XX.YY) might appear on the control-panel display. Eventually a formatter connection missing message will appear. Turn the power off, and then on again to restart the initialization process. If the error persists, perform a firmware upgrade. 248 Chapter 3 Solve problems ENWW
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