Lenovo System x3250 M4 Installation And Service Manual Download

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Working inside the server with the power on

Guidelines to work inside the server with the power on.

Attention:

Static electricity that is released to internal server components when the server is powered-on

might cause the server to halt, which might result in the loss of data. To avoid this potential problem,
always use an electrostatic-discharge wrist strap or other grounding system when you work inside the
server with the power on.

You might have to have the server turned on while the cover is off, to look at system-board LEDs or replace
hot-swap components. Follow these guidelines when you work inside a server that is turned on:

• Avoid wearing loose-fitting clothing on your forearms. Button long-sleeved shirts before working inside

the server; do not wear cuff links while you are working inside the server.

• Do not allow your necktie or scarf to hang inside the server.

• Remove jewelry, such as bracelets, necklaces, rings, and loose-fitting wrist watches.

• Remove items from your shirt pocket, such as pens and pencils, that could fall into the server as you

lean over it.

• Avoid dropping any metallic objects, such as paper clips, hairpins, and screws, into the server.

Handling static-sensitive devices

Use this information to handle static-sensitive devices.

Attention:

Static electricity can damage the server and other electronic devices. To avoid damage, keep

static-sensitive devices in their static-protective packages until you are ready to install them.

To reduce the possibility of damage from electrostatic discharge, observe the following precautions:

• Limit your movement. Movement can cause static electricity to build up around you.

• The use of a grounding system is recommended. For example, wear an electrostatic-discharge wrist

strap, if one is available. Always use an electrostatic-discharge wrist strap or other grounding system
when working inside the server with the power on.

• Handle the device carefully, holding it by its edges or its frame.

• Do not touch solder joints, pins, or exposed circuitry.

• Do not leave the device where others can handle and damage it.

• While the device is still in its static-protective package, touch it to an unpainted metal surface on the

outside of the server for at least 2 seconds. This drains static electricity from the package and from
your body.

• Remove the device from its package and install it directly into the server without setting down the device.

If it is necessary to set down the device, put it back into its static-protective package. Do not place the
device on the server cover or on a metal surface.

• Take additional care when handling devices during cold weather. Heating reduces indoor humidity

and increases static electricity.

Removing the cover

Use this information to remove the cover.

Read the safety information in “Safety” on page v and “Installation guidelines” on page 33.

If you are replacing a server component or an optional device in the server, you need to turn off the server
and peripheral devices, and disconnect the power cords and all external cables.

Lenovo System x3250 M4, Installation And Service Manual

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