Figure 9. Rear view LEDs of the server
Table 6. LEDs on the rear of the server
Callout Callout
1 Ethernet link LED (green) 2 Ethernet activity LED (green)
3 System ID LED (blue) 4 Power input LED (green)
5 Power output LED (green) 6 Power supply error LED (yellow)
1 2 Ethernet status LEDs
Each network connector has two status LEDs.
Ethernet status LED
Color Status
Description
1 Ethernet link LED
Green On
Network link is established.
None
Off
Network link is disconnected.
2 Ethernet activity LED
Green
Blinking Network link is connected and active.
None
Off The server is disconnected from a LAN.
3 System ID LED
The blue system ID LED helps you to visually locate the server. A system ID LED is also located on the front
of the server. Each time you press the system ID button, the state of both the system ID LEDs changes. The
LEDs can be changed to on, blinking, or off. You can also use the Lenovo XClarity Controller or a remote
management program to change the state of the system ID LEDs to assist in visually locating the server
among other servers.
4 Power input LED
5 Power output LED
6 Power supply error LED
Each hot-swap power supply has three status LEDs.
22
ThinkSystem ST550 Maintenance Manual
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