System pulse LEDs
This section describes the system pulse LEDs on the system board that monitors the system power-on and power-off and boot progress.
The following LEDs are on the system board and monitor the system power-on and power-off sequencing and boot progress. For the location of these LEDs, see System-board LEDs.
CPLD heartbeat LED: If the LED flashes at 1 Hz, it is functioning properly and no action is necessary. If the LED is not flashing, replace the system board (Trained technician only).
IMM2.1 heartbeat LED: The LED status shows the following different stages of the IMM2.1 heartbeat sequencing process:
- When this LED is blinking fast (approximately 4 Hz), this indicates that the IMM2.1 code is in the loading process.
- When this LED goes off momentarily, this indicates that the IMM2.1 code has loaded completely.
- When this LED goes off momentarily and then starts blinking slowing (approximately 1 Hz), this indicates that IMM2.1 is fully operational. You can now press the power-control button to power on the server.
- (Trained technician only) If this LED does not blink within 30 seconds of connecting a power source to the server, replace the system board.
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