•Always load the rack from the bottom up, and load the heaviest item in the rack first.
•Make sure that the rack is level and stable before extending a component from the rack.
•Use caution when pressing the component rail release latches and sliding a com- ponent into or out of a rack; the slide rails can pinch your fingers.
•After a component is inserted into the rack, carefully extend the rail into a locking position, and then slide the component into the rack.
•Do not overload the AC supply branch circuit that provides power to the rack. The total rack load should not exceed 80 percent of the branch circuit rating.
•Ensure that proper airflow is provided to components in the rack.
•Do not step on or stand on any system/component when servicing other systems/components in a rack.
Precautions for Products With Modems, Telecommunications, or Local Area Network Options
Observe the following guidelines when working with options:
•Do not connect or use a modem or telephone during a lightning storm. There may be a risk of electrical shock from lightning.
•Never connect or use a modem or telephone in a wet environment.
•Do not plug a modem or telephone cable into the network interface controller (NIC) receptacle.
•Disconnect the modem cable before opening a product enclosure, touching or installing internal components, or touching an uninsulated modem cable or jack.
•Do not use a telephone line to report a gas leak while you are in the vicinity of the leak.
Precautions for Products With Laser Devices
Observe the following precautions for laser devices:
•Do not open any panels, operate controls, make adjustments, or perform proce- dures on a laser device other than those specified in the product’s documentation.
•Only authorized service technicians should repair laser devices.
When Working Inside Your Computer
Before you remove the computer covers, perform the following steps in the sequence indicated.
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