Server Power Features; Turning On The Server; Turning Off The Server - Lenovo ThinkServer RD220 Hardware Maintenance Manual

• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See Chapter 7 "Parts listing, ThinkServer RD220 Type 3729, 3779, 3797, and 3798" on page 205 to determine
which components are customer replaceable units (CRU) and which components are field replaceable
units (FRU).
• If an action step is preceded by "(Trained service technician only)," that step must be performed only by
a trained service technician.
Power-supply LEDs
AC DC Error
On Off On
On On Off
On On On

Server power features

When the server is connected to a power source but is not turned on, the operating system does not run,
and all core logic except for the Integrated Management Module (IMM) is shut down; however, the server
can respond to requests from the IMM, such as a remote request to turn on the server. The power-on LED
flashes to indicate that the server is connected to power but is not turned on.

Turning on the server

Approximately 3 minutes after the server is connected to power, the power-control button becomes active,
and one or more fans might start running to provide cooling while the server is connected to power. You can
turn on the server and start the operating system by pressing the power-control button. If a power failure
occurs while the server is turned on, the server will restart automatically when power is restored.
For 32-bit operating systems only: Some memory is reserved for various system resources and is
unavailable to the operating system. The amount of memory that is reserved for system resources depends
on the operating system, the configuration of the server, and the configured PCI options.

Turning off the server

When you turn off the server and leave it connected to power, the server can respond to requests from the
IMM, such as a remote request to turn on the server. While the server remains connected to power, one
or more fans might continue to run. To remove all power from the server, you must disconnect it from the
power source.
Important: To view the error LEDs on the system board, leave the server connected to a power source.
Some operating systems require an orderly shutdown before you turn off the server. See your
operating-system documentation for information about shutting down the operating system.
Statement 5
CAUTION:
The power control button on the device and the power switch on the power supply do not turn off
Description Action
Faulty power Replace the power supply.
supply
Normal
operation
Power supply Replace the power supply.
is faulty but still
operational
Notes
47
.
Chapter 5 Diagnostics