CRPS power supply LED
Figure 16. CRPS Power supply LED
LED Description
1  Power supply 
status
The power supply status LED can be in one of the following states:
•  Green: The power supply is connected to the AC power source and working normally.
•  Off: The power supply is disconnected from the AC power source.
•  Slow blinking green (about one flash every second): The power supply is in PSU standby state 
with AC present, cold standby state, or always standby state.
•  Amber: The AC power cord is unplugged, AC power lost (with a second power supply in 
parallel still in AC power input power), or power supply has failed. To resolve the issue, replace 
the power supply.
•  Slow blinking amber (about one flash every second): Power supply warning events where the 
power supply continues to operate.
•  Fast blinking green (about 2 flashes each second): Power supply firmware updating.
System-board LEDs
The following illustrations show the light-emitting diodes (LEDs) on the system board.
Press the power button to light the LEDs on the system board when the power source has been removed 
from the server.
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ThinkSystem ST250 V3 System Configuration Guide