Xerox 4540 Service Manual - Page 220
C.2.1 CPU Board LEDs
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TABLE C-3 lists the disk drive LEDs: TABLE C-3 Internal LEDs Name Color Function Disk Drives Status (Power) Green Unit is OK. See Note in Section C.2, "Disk Drive and Fan Tray LEDs" on page C-6. Fault (Alert) Amber Service action is required. Ready to Remove Blue Service action is allowed. Fan Trays Status Green Unit is OK. Blinking = data transfer. Fault Amber Fault (Service action required) C.2.1 CPU Board LEDs The CPU board has three types of LEDs. They are listed in TABLE C-3 and appear in FIGURE C-6. The CPU LEDs are active only when the Remind button is depressed. They blink to indicate a failure; otherwise they stay Off. Note - The CPU and DIMM LEDs continue to indicate a failure until the system is powered on. The Battery LED continues to indicate a failure until the service processor is started. C-10 Sun Fire X4500/X4540 Server Service Manual • May 2010