Compaq ProLiant 8500 ProLiant 8500 Servers Maintenance and Service Guide - Page 26

Preparation Procedures, Hot-Pluggable Parts

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Removal and Replacement Procedures 2-3 Preparation Procedures System power in Compaq ProLiant 8500 servers does not completely shut off with the front panel Power On/Standby switch. The switch toggles between On and Standby, rather than On and Off. The Standby position removes power from most electronics and the drives, but portions of the power supply, the Integrated Management Display (IMD), the system interlock circuitry, and some internal circuitry remain active. You must disconnect all power cords from the server to completely remove all power from the system. WARNING: To reduce the risk of electric shock or damage to the equipment, disconnect power from the server by unplugging all power cords from either the electrical outlet or the server. IMPORTANT: To completely remove all power from the system, you must disconnect the power cord from the server. In systems with multiple power supplies, you must disconnect all the power cords to completely remove power from the system. IMPORTANT: It is necessary to be knowledgeable of electrostatic discharge information before conducting the preparation procedures. For electrostatic discharge information, see "Electrostatic Discharge Information" earlier in this chapter. Hot-Pluggable Parts Before beginning the removal of any serviceable parts, determine whether the part is hot-pluggable or non-hot-pluggable. If it is hot-pluggable, do not perform a power shutdown of the server. The access panels can be removed while the server is powered up without causing a system shutdown. When the server is in Standby mode, portions of the power supply, auxiliary power (+5V), and some internal circuitry will remain active. Non-Hot-Pluggable Parts If any serviceable parts are non-hot-pluggable, then the server must be shut down. Non-hot-pluggable parts include the processor, Processor Power Module, system board, memory board, and DIMMs. Refer to "Turning Off the Server" later in this chapter for complete instructions. IMPORTANT: It is not necessary to turn off the server to replace hot-pluggable devices, such as PCI Hot Plug power supplies or hot-pluggable fans.

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Removal and Replacement Procedures
2-3
Preparation Procedures
System power in Compaq ProLiant 8500 servers does not completely shut off with the front
panel Power On/Standby switch. The switch toggles between On and Standby, rather than On
and Off. The Standby position removes power from most electronics and the drives, but portions
of the power supply, the Integrated Management Display (IMD), the system interlock circuitry,
and some internal circuitry remain active. You must disconnect all power cords from the server
to completely remove all power from the system.
WARNING:
To reduce the risk of electric shock or damage to the equipment, disconnect power
from the server by unplugging all power cords from either the electrical outlet or the server.
IMPORTANT:
To completely remove all power from the system, you must disconnect the power cord
from the server. In systems with multiple power supplies, you must disconnect all the power cords to
completely remove power from the system.
IMPORTANT:
It is necessary to be knowledgeable of electrostatic discharge information before
conducting the preparation procedures. For electrostatic discharge information, see “Electrostatic
Discharge Information” earlier in this chapter.
Hot-Pluggable Parts
Before beginning the removal of any serviceable parts, determine whether the part is
hot-pluggable or non-hot-pluggable. If it is hot-pluggable, do not perform a power shutdown of
the server. The access panels can be removed while the server is powered up without causing a
system shutdown. When the server is in Standby mode, portions of the power supply, auxiliary
power (+5V), and some internal circuitry will remain active.
Non-Hot-Pluggable Parts
If any serviceable parts are non-hot-pluggable, then the server must be shut down.
Non-hot-pluggable parts include the processor, Processor Power Module, system board,
memory board, and DIMMs. Refer to “Turning Off the Server” later in this chapter for complete
instructions.
IMPORTANT:
It is not necessary to turn off the server to replace hot-pluggable devices, such as
PCI Hot Plug power supplies or hot-pluggable fans.