Electrostatic Discharge Information; System Interconnect Status Led Indicators; Preparation Procedures - Compaq ProLiant DL760 Maintenance And Service Manual

2-2 Compaq ProLiant DL760 Servers Maintenance and Service Guide

Electrostatic Discharge Information

A discharge of static electricity can damage static-sensitive devices or microcircuitry. Proper
packaging and grounding techniques are necessary precautions to prevent damage. To prevent
electrostatic damage, observe the following precautions:
I
Transport products in static-safe containers, such as conductive tubes, bags, or boxes.
I
Keep electrostatic-sensitive parts in their containers until they arrive at static-free stations.
I
Cover workstations with approved static-dissipating material. Use a wrist strap connected
to the work surface and properly grounded tools and equipment.
I
Keep the work area free of nonconductive materials, such as ordinary plastic assembly
aids and foam packing.
I
Make sure you are always properly grounded when touching a static-sensitive component
or assembly.
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Avoid touching pins, leads, or circuitry.
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Always place drives PCB assembly-side down.
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Use conductive field service tools.

System Interconnect Status LED Indicators

Compaq ProLiant DL760 servers ship with system interconnect status LED indicators. These 17
LED indicators provide a closed-loop checking mechanism for verifying proper component
mating and interconnections between critical server components. The indicators provide a visual
aid to assist in isolating which components to check if the server will not power up. These LED
indicators are located in the I/O module and can be viewed through the top access panel. See
Chapter 4, "Connectors, Switches, and LED Indicators," for more information.

Preparation Procedures

System power in Compaq ProLiant DL760 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.
IMPORTANT: It is necessary to be knowledgeable about electrostatic discharge information before
conducting the preparation procedures. For electrostatic discharge information, see "Electrostatic
Discharge Information" earlier in this chapter.
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. In
systems with multiple power supplies, you must disconnect all the power cords to completely
remove power from the system.