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12
Rack release latches:
Press the latch on both sides in the front of the server to slide the server out of the rack.
13
2.5-inch drive bays:
Install 2.5-inch drives to these bays. See
page 58
for more details.
Front operator panel
The following illustration shows the controls and LEDs on the front operator panel.
Figure 5. Front operator panel
Table 4. Buttons and LEDs on the front operator panel
Power button/LED (green)
1
Network activity LED (green)
2
1
Power button/LED (green)
Press this button to turn the server on and off manually. The states of the power LED are as follows:
Off: No power supply is properly installed, or the LED itself has failed.
Flashing rapidly (4 times per second): The server is turned off and is not ready to be turned on. The
power-control button is disabled. This will last approximately 5 to 10 seconds.
Flashing slowly (once per second): The server is turned off and is ready to be turned on. You can press
the power-control button to turn on the server.
Lit: The server is turned on.
2
Network activity LED (green)
When this LED is lit, it indicates that the server is transmitting to or receiving signals from the Ethernet LAN.
3
Identification 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.
4
System error LED (yellow)
When this yellow LED is lit, it indicates that a system error has occurred. This LED can be controlled by the
XCC. Information provided from the LCD display of the front operator panel could also help isolate an error.
Front operator panel with LCD display
The following section includes an overview of the LCD system information display panel of front operator
panel, which displays various types of information about the server.
ThinkSystem SR850 Maintenance Manual
16
"2.5-inch hot-swap drive and drive backplane replacement" on
Identification button/LED (blue)
3
System error LED (yellow)
4
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