Each hot-swap power supply has three status LEDs.
LED Description
5 Power input LED
• Green: The power supply is connected to the ac power source.
• Off: The power supply is disconnected from the ac power source or a power problem
occurs.
6 Power output LED
• Green: The server is on and the power supply is working normally.
• Blinking green: The power supply is in zero-output mode (standby). When the server
power load is low, one of the installed power supplies enters into the standby state
while the other one delivers entire load. When the power load increases, the standby
power supply will switch to active state to provide sufficient power to the server.
To disable zero-output mode, log in to the Lenovo XClarity Controller web interface,
choose Server Configuration âž™ Power Policy, disable Zero Output Mode, and then
click Apply. If you disable zero-output mode, both power supplies will be in the active
state.
• 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.
7 Power supply error LED • Yellow: The power supply has failed. To resolve the issue, replace the power supply.
• Off: The power supply is working normally.
System board components
The illustration in this section shows the component locations on the system board.
Chapter 2. Server components 53