LED
Description
1 Input status
The input status LED can be in one of the following states:
• Off: The power supply is disconnected from the AC power source.
• Green: The power supply is connected to the AC power source.
2 Output status
The output status LED can be in one of the following states:
• Off: The server is powered off, or the power supply is not working properly. If the server is
powered on but the output status LED is off, replace the power supply.
• Slow blinking green (about one flash every two seconds): The power supply is in cold
redundancy active mode.
• Fast blinking green (about 2 flashes each second): The power supply is in cold redundancy
sleep mode.
• Green: The server is on and the power supply is working normally.
3 Fault LED
• Off: The power supply is working normally
• Amber: The power supply may have failed. Dump the FFDC log from the system and contact
Lenovo back end support team for PSU data log reviewing.
Upper processor board (CPU BD) LEDs
The following illustrations show the light-emitting diodes (LEDs) on the upper processor board (CPU BD).
Press the power button to light the LEDs on the upper processor board (CPU BD) when the power source
has been removed from the server.
Figure 19. Upper processor board (CPU BD) LEDs
32 ThinkSystem SR950 V3 System Configuration Guide
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