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Light path diagnostics LEDs description

This topic provides a description of the light path diagnostics LEDs.

The following table describes the server LEDs to help you detect the location of the problems. For the location of the server LEDs, see Storage book LEDs, Compute book LEDs, DIMMs and microprocessor LEDs, Half-length I/O book LEDs, Full-length I/O book LEDs, Standard I/O book LEDs, and Power-supply LEDs.

Note
Check the IMM event log or the system-event log for additional information before you replace a FRU. See Parts listing, System x3850 X6 and x3950 X6 Type 6241, to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU).
Table 1. Light path diagnostics LEDs description
LEDDescription
3V battery error LEDWhen this LED is lit, it indicates that a standard I/O book battery error has occurred.
AC power LEDEach hot-swap power supply has an ac power LED and a dc power LED. When the ac power LED is lit, it indicates that sufficient power is being supplied to the power supply through the power cord. During normal operation, both the ac and dc power LEDs are lit.
Board error LEDWhen this yellow LED is lit, it indicates that the book board error has occurred.
Check log LEDWhen this LED is lit (yellow), it indicates that there are errors that require further diagnosis. Check the IMM event log for additional information. See Event logs for more information about event logs.
DC power LEDEach hot-swap power supply has a dc power LED and an ac power LED. When the dc power LED is lit, it indicates that the power supply is supplying adequate dc power to the system. During normal operation, both the ac and dc power LEDs are lit.
DIMM error LEDWhen this LED is lit, it indicates that a memory error has occurred.
Drive activity LEDsThese LEDs are on SAS or SATA hard disk drives and solid state drives. Each hot-swap drive has an activity LED, and when this LED is flashing, it indicates that the drive is in use. When this LED is solid, it indicates that the drive is powered on but not in use.
Drive status LEDsThese LEDs are on SAS or SATA hard disk drives and solid state drives. When one of these LEDs is lit, it indicates that the drive has failed. When this LED is flashing slowly (one flash per second), it indicates that the drive is being rebuilt. When the LED is flashing rapidly (three flashes per second), it indicates that the controller is identifying the drive.
Ethernet activity LEDWhen these LEDs are lit, they indicate that the server is transmitting to or receiving signals from the Ethernet LAN that is connected to the Ethernet port.
Ethernet link LEDsWhen these LEDs are lit, they indicate that there is an active link connection on the 100BASE-TX, 1000BASE-TX, or 10GBASE-TX interface for the Ethernet port.
Fan error LEDWhen this LED is lit, it indicates that a fan has failed, is operating too slowly, or has been removed.
Locate button/LEDPress this button to visually locate the server among other servers. When you press the locate button, the LED is lit and remains lit until you press it again to turn it off. This button is also used as the physical presence for the Trusted Platform Module (TPM). You can use management software, such as Lenovo XClarity Administrator software, to light this LED remotely. This LED is controlled by the IMM2.
Microprocessor error LEDWhen this LED is lit, it indicates that a microprocessor error has occurred.
PCIe slot error LEDWhen these LEDs are lit, they indicate that an error has occurred in PCIe slots.
Power button/LEDPress this button to turn the server on and off manually or to wake the server from a reduced-power state. The states of the power-on LED are as follows:
  • Off: Input power is not present, or the power supply or the LED itself has failed.
  • Flashing rapidly (3 times per second): The server is turned off and is not ready to be turned on. The power-on button is disabled. This lasts approximately 10 seconds after input power has been applied or restored.
  • Flashing slowly (once per second): The server is turned off and is ready to be turned on. You can press the power-on button to turn on the server.
  • Lit: The server is turned on.
Power supply error LEDWhen this yellow LED is lit, it indicates that a power supply error has occurred.
System error LEDWhen this yellow LED is lit, it indicates that a system error has occurred. A system-error LED is also on the rear of the server. This LED is controlled by the IMM2. Additional information can also be seen on the LCD display panel (see LCD system information display panel for more information).