4 System ID button/LED (blue): Use this blue LED to visually locate the server among other servers. This
LED is also used as a presence detection button. You can use Lenovo XClarity Administrator to light this LED
remotely.
5 System-error LED (yellow): When 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. Messages on the LCD system information display panel
and LEDs on other server components might also be lit to help isolate the error. This LED is controlled by the
Lenovo XClarity Controller.
Power supply LEDs
The illustration in this section shows the LEDs on the power supply.
300 watts Power supply LEDs
Figure 132. 300 watts Power supply LEDs
Each hot-swap power supply has three status LEDs.
Table 15. 300 watts Power supply LEDs
LED Description
1 Power input LED
(green)
• Off: The power supply is disconnected from the ac power source or a power problem
occurs.
• Green: The power supply is connected to the ac power source.
2 Power output LED
(green)
• Off: The server is powered off, or the power supply is not working properly. If the
server is powered on but the power output LED is off, replace the power supply.
• Green: The server is on and the power supply is working normally.
3 Power supply error LED
(yellow)
• Off: The power supply is working normally.
• Yellow: The power supply has failed. To resolve the issue, replace the power supply.
450 watts Power supply LED
Figure 133. 450 watts Power supply LED
Note: The location of the power supply LED will vary depending on model.
Each hot-swap power supply has one status LED.
144 ThinkSystem SR250 V2 Maintenance Manual
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