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in. To remove power from system, you must unplug the AC power cord from
the wall outlet. Make sure the AC power cord is unplugged before you open the
chassis, add, or remove any components.
Hazardous conditions, devices and cables: Hazardous electrical conditions
may be present on power, telephone, and communication cables. Turn off the
server and disconnect the power cord, telecommunications systems, networks,
and modems attached to the server before opening it. Otherwise, personal
injury or equipment damage can result.
Electrostatic discharge (ESD) and ESD protection: ESD can damage disk
drives, boards, and other parts. We recommend that you perform all procedures
in this chapter only at an ESD workstation. If one is not available, provide
some ESD protection by wearing an anti-static wrist strap attached to chassis
ground (any unpainted metal surface) on your server when handling parts.
ESD and handling boards: Always handle boards carefully. They can be
extremely sensitive to ESD. Hold boards only by their edges. After removing a
board from its protective wrapper or from the server, place the board component
side up on a grounded, static-free surface. Use a conductive foam pad if
available but not the board wrapper. Do not slide board over any surface.
Installing or removing jumpers: A jumper is a small plastic encased
conductor that slips over two jumper pins. Some jumpers have a small tab on
top that you can grip with your fingertips or with a pair of fine needle-nosed
pliers. If your jumpers do not have such a tab, take care when using needle-
nosed pliers to remove or install a jumper; grip the narrow sides of the jumper
with the pliers, never the wide sides. Gripping the wide sides can damage the
contacts inside the jumper, causing intermittent problems with the function
controlled by that jumper. Take care to grip with, but not squeeze, the pliers or
other tool you use to remove a jumper, or you may bend or break the stake pins
on the board.
Rearrange the Standoffs
If your chassis does not have board mount standoffs placed as shown in Figure 22, you must
rearrange them so they match the holes in the server board. Failure to properly rearrange the metal
standoffs may cause the server board to malfunction and may permanently damage it. Your chassis
may be different from the illustration.
88
Upgrading the Hardware
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