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System-error LED: This amber LED is on when a system error occurs. An LED
on the diagnostic LED panel will also be on to further isolate the error. (For
more information, see the Hardware Maintenance Manual and Troubleshooting
Guide on the IBM xSeries Documentation CD.)
Ethernet transmit/receive activity LED: When this green LED is on, there is
activity between the server and the network.
Server power features
This section contains information about how to properly turn your server on and off.
Turning on the server
Turning on the server refers to the act of plugging the power cords of your server
into the power source and starting the operating system.
You can turn on the server in any of the following ways:
v If the power cords are connected to a power source, you can press the
power-control button on the front of the server.
Notes:
1. You can install a circular disk over the power-control button to prevent
accidental manual power-off. This disk, known as the power-control button
shield, comes with your server.
2. After you plug the power cords of your server into the electrical outlets, wait
approximately 20 seconds before pressing the power-control button. During
this time, the system-management adapter is initializing; therefore, the
power-control button does not respond.
v
If the server is turned on and a power failure occurs, the server will restart
automatically when power is restored.
v If ac power is present, the server is in Standby mode, and the server is
connected to an ASM interconnect network that contains at least one system with
an optional Remote Supervisor Adapter installed, the server can be turned on
from the Remote Supervisor Adapter user interface.
v If ac power is present, the server is in Standby mode, and an optional Remote
Supervisor Adapter is installed in the server, the server can be turned on from
the Remote Supervisor Adapter user interface.
v When you plug in your server for the first time, Wake on LAN can turn on the
server.
v If your server was previously turned on, it must be properly placed in Standby
mode for the Wake on LAN feature to turn on the server.
12 IBM xSeries 235 Type 8671: User’s Guide