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• The air baffles are installed over the DIMM connectors.
• The ventilation holes on the compute node are not blocked.
• The compute node CMOS battery is operational. If the CMOS battery becomes defective, replace it
immediately.
Handling static-sensitive devices
To reduce the possibility of damage from electrostatic discharge, observe these precautions.
Attention: Static electricity can damage the compute node and other electronic devices. To avoid damage,
keep static-sensitive devices in their static-protective packages until you are ready to install them.
• When you work on a Flex System chassis that has an electrostatic discharge (ESD) connector, use a wrist
strap, especially when you handle modules, optional devices, or compute nodes. To work correctly, the
wrist strap must have a good contact at both ends (touching your skin at one end and firmly connected to
the ESD connector on the front or back of the Flex System chassis).
• Limit your movement. Movement can cause static electricity to build up around you.
• 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 part of the Flex
System chassis or any unpainted metal surface on any other grounded rack component in the rack in
which you are installing the device 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 compute node 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 compute node cover or on a metal surface.
• Take additional care when you handle devices during cold weather. Heating reduces indoor humidity
and increases static electricity.
Returning a device or component
If you are instructed to return a device or component, follow all packaging instructions, and use any
packaging materials for shipping that are supplied to you.
Updating the compute node configuration
Use this information to update the compute node configuration.
When the compute node starts for the first time after you add or remove an internal device, you might
receive a message that the configuration has changed. The Setup utility automatically starts so that you
can save the new configuration settings. See "Using the Setup utility" on page 24 for more information
about the Setup utility.
Some devices have device drivers that you must install. See the documentation that comes with each
device for information about installing device drivers.
The compute node operates as a symmetric multiprocessing (SMP) compute node, regardless of how
many microprocessors are installed. For optimum performance, you must upgrade the operating system
to support SMP. See Chapter 3 "Installing the operating system" on page 43 and your operating-system
documentation for additional information.
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Flex System x220 Compute Node Installation and Service Guide
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Troubleshooting
