IBM 7945E2U User Manual - Page 49

System-board LEDs, System pulse LEDs

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System-board LEDs The following illustration shows the light-emitting diodes (LEDs) on the system board. Note: Error LEDs remain lit only while the server is connected to power. System pulse LEDs The following LEDs are on the system board and monitor the system power-on and power-off sequencing and boot progress (see "System-board LEDs" for the location of these LEDs). Table 6. System-pulse LEDs LED Description Action Enclosure manager heartbeat Indicates the status of (Trained service technician power-on and power-off only) If the server is sequencing. connected to power and the LED is not flashing, replace When the server is the system board. connected to power, this LED flashes slowly to indicate that the enclosure manager is working correctly. Chapter 2. Installing optional devices 33

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System-board LEDs
The following illustration shows the light-emitting diodes (LEDs) on the system
board.
Note:
Error LEDs remain lit only while the server is connected to power.
System pulse LEDs
The following LEDs are on the system board and monitor the system power-on and
power-off sequencing and boot progress (see “System-board LEDs” for the location
of these LEDs).
Table 6. System-pulse LEDs
LED
Description
Action
Enclosure manager heartbeat
Indicates the status of
power-on and power-off
sequencing.
When the server is
connected to power, this LED
flashes slowly to indicate that
the enclosure manager is
working correctly.
(Trained service technician
only) If the server is
connected to power and the
LED is not flashing, replace
the system board.
Chapter 2. Installing optional devices
33