Lenovo ThinkSystem SR850 Maintenance Manual page 27

Insert LOM adapter into this slot. (see "System-board connectors" on page 21 for the location of the LOM
adapter slot on the system board and "LOM adapter replacement" on page 71 for information about the
installation of the LOM adapter.
5 AC power LED:
Each hot-swap power supply comes with an ac power LED and a dc power LED. When the ac power LED is
lit, it indicates that sufficient power is being supplied to the power supply through the power cord. During
normal operation, both the ac and dc power LEDs are lit. For more information, see "Light path diagnostics"
on page 137.
6 DC power LED:
Each hot-swap power supply comes with a dc power LED and an ac power LED. When the dc power LED is
lit, it indicates that the power supply is supplying adequate dc power to the system. During normal operation,
both the ac and dc power LEDs are lit. For more information, see "Light path diagnostics" on page 137.
7 Power-supply error LED:
When the power-supply error LED is lit, it indicates that the power supply has failed.
8 9 Power supply units:
Install power supply units to these bays, connect them to power cords. Make sure the power cords are
connected properly. Following are the power supplies supported by this system:
• 750-watt platinum power supply
– Input power 115V or 230V ac
• 1100-watt platinum power supply
– Input power 115V or 230V ac
• 1600-watt platinum power supply
– Input power 230V ac
10 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.
11 Identification button:
Press this button to visually locate the server among other servers. This button is functionally equivalent to
the identification button on the front of the server.
12 Identification LED (blue):
Use this LED to visually locate the server among other servers. XCC can also be used to turn this LED on and
off. This LED is functionally equivalent to the identification LED on the front of the server.
13 14 USB connectors (USB 3.0):
Connect a USB device, such as a USB mouse, keyboard, or other device, to any of these connectors.
15
Serial connector:
.
Chapter 2 Server components
19